Dust Mite Removal Service: How a Garment Factory Lost a 4.6 Million Baht Export Order to Its Own Fabric Piles and Dormitory Bunks

Two hundred and twelve machinists. Eight sewing lines. Ninety-six bunk beds. Four hundred and eighteen rolls of cloth. And one social compliance audit that turned a room full of sneezing into a seven-figure loss — until a single dust mite removal service visit turned it back.

The Morning of 6 October 2025, on Sewing Line 3

At twenty to ten in the morning, in Building One of Sri Phatthana Garment Co., Ltd., a contract manufacturer in the Bang Pu industrial zone of Samut Prakan, one hundred and sixty-four industrial machines were running at once. After nine years on the floor, nobody hears that noise any more. Line 3 was assembling lined winter jackets for a European customer, the first batch of an autumn order due to ship in December.

Supannee Thongsaen, thirty-eight years old, an overlock machinist on Line 3, laid a panel on her machine bed and stopped. The line supervisor, standing three metres away, later said that she could hear Supannee breathing over the sound of the machines — a long thin whistle on the way out. Supannee tried to say something and did not finish the sentence. She took hold of the edge of the table and sat down hard on the concrete beside her own chair.

Two workers walked her to the first-aid room. The factory van got her to the hospital in Mueang Samut Prakan district in under twenty minutes. She was given a bronchodilator, observed for four hours, and discharged with a note describing an allergen-triggered asthma attack. Supannee was thirty-eight and had never in her life been diagnosed with asthma. She was off work for six days.

When Uraiwan Phongsathaporn, the production manager, sat down afterwards and read back through eight months of first-aid room entries, what she found was not a one-off. Between February and September 2025 there had been 147 separate visits for respiratory symptoms: sneezing fits, blocked noses, runny noses, red and itchy eyes, chest tightness, and dry coughing at night. Four workers had been diagnosed with asthma or bronchial hyper-reactivity inside that same window. Seven more had an itchy rash on their forearms and necks that came back every month.

All of these people had two things in common. They spent ten hours a day surrounded by textiles, and most of them slept in the same company dormitory block eighty metres from the factory gate.

What Was Actually Accumulating in the Cloth, Under the Machines, and in the Bunks

A garment factory has fibre in every square metre of it, from uncut rolls in the warehouse to the fine lint that hangs in the air and settles on every surface in the building. People in the trade call it fabric dust, and they treat it as a normal part of the job rather than a health issue. Nobody reclassifies it until somebody collapses beside a sewing machine.

The first thing to understand is that lint is not a dust mite. Lint is excellent housing for dust mites. It holds moisture, it traps the skin flakes that every human body sheds all day, and it collects in exactly the places that no cleaning routine ever reaches. Combine that with the relative humidity of coastal Samut Prakan, measured inside the fabric warehouse at between 74 and 81 percent for most of the year, and what you have is a dust mite breeding ground the size of a factory building.

Four hundred and eighteen fabric rolls that had not moved off the racks in two years

The Sri Phatthana fabric store is a single-storey building under a steel roof, fitted out with five-tier steel racking holding 418 rolls: cotton, brushed cotton, fleece, memory fabric and lining. Some of it had been over-ordered back in 2023 and had been lying on the top tier untouched ever since. Fleece and long-pile cloth are the best moisture sponges in the room, and the gaps between stacked rolls are dark, still and unventilated — which matches every environmental preference a dust mite has.

Every time a warehouse hand pulls a roll down, the lint and dust resting on its surface lifts off in a cloud. On a day when sunlight comes through the roof vents in beams, you can watch those particles filling the light. What the eye sees is only the coarse fraction. The particles small enough to travel to the far end of a bronchial tree are not visible at all.

Cut-piece bundles stacked beside all eight sewing lines

Once the cutting room has cut the panels, the pieces are bundled by size and by lot and either loaded onto trolleys or stacked straight onto the floor beside the line, waiting to be sewn. In a busy order period a bundle might sit there for two to five days. In that time it collects airborne lint falling out of the air, sweat from every hand that touches it, and the heat and humidity of a building with no air conditioning — just fourteen industrial fans pushing the same air around in circles.

Every machinist reaches into that pile and lifts out one panel at a time, several hundred times a day. Every lift releases particles less than fifty centimetres from her face. That is the reason machinists in any factory tend to have worse symptoms than office staff in the same building.

Lint under the machine tables, in the cable trays, and on the roof trusses

Every machine table has a thread tray under it, and around that tray the lint has compressed itself into a thin felt mat built up over years. The same layer sits in the cable trays, in the recesses under the machine beds, on top of the electrical cabinets, and on the steel roof trusses seven metres up, a centimetre deep in places. Every time a ceiling fan runs or a forklift goes past, some of it comes down again.

The factory had always cleaned it with an air gun off the compressed air line, which is the fastest method available and simultaneously the worst one. Compressed air removes nothing from the building. It takes lint and allergen that were lying still and converts them into an aerosol that 212 people breathe, and then lets them settle back into the same places within two hours.

The dormitory: 96 bunk beds, 192 mattresses

This was the part nobody had thought about at all. The workers' dormitory is a three-storey block with 48 rooms, two bunk beds per room — 96 bunks, 192 foam mattresses. One hundred and seventy-four of the 212 staff lived there. The rooms have no air conditioning, one wall fan each, and louvre windows that many residents had sealed shut against driving rain. The cotton blackout curtains had been installed with the building in 2019 and had never once been taken down for cleaning.

The 192 foam mattresses, four centimetres thick, were bought at the same time in 2019. HR washed the covers twice a year on a fixed schedule. The foam core underneath had never been deep cleaned in six years. Every night, workers who had just finished a ten-hour shift in a building full of airborne lint walked into their rooms with that lint in their hair and on their clothes and lay down on the same foam. Top bunks were measurably worse than bottom bunks, because they sit closest to a hot, still ceiling.

Supannee had the bottom bunk in Room 214. She had been sleeping on the same mattress since her first day nine years earlier.

Why a Dust Mite Removal Service Matters More in a Garment Factory Than in a House

Dust mites are arachnids rather than insects: eight legs, rounded bodies, milky white, and 0.1 to 0.3 millimetres long, which puts them completely beyond the naked eye. They live in damp, dark places and cling to fibre — mattresses, pillows, mosquito nets, curtains, upholstered furniture. In a garment factory you have to add fabric rolls, cut-piece bundles and the compacted lint under every machine table to that list.

Dust mites do not bite and they are not disease vectors in the way a mosquito is. The real problem is their droppings. Dust mite faecal particles contain proteins that act as potent allergens, and when a sensitised person inhales them the body mounts a hypersensitivity response. The recognised consequences are allergic rhinitis and general allergy, conjunctivitis, asthma, dermatitis and itchy rashes, and chronic headaches.

Three things make a garment factory different from a home.

The first is exposure time. A normal person spends eight hours a night in their bedroom. A machinist spends ten hours a day inside airborne fibre, then eight more hours asleep on an allergen-loaded mattress. That is eighteen hours a day of exposure, seven days a week during a peak order run. The body never gets a clean interval in which to settle down.

The second is stacking. Dust mite allergen in a factory does not act alone. It arrives mixed with cotton and synthetic lint that irritates the airway in its own right. Chronic irritation makes the nasal lining and the bronchi progressively more reactive to everything else. A worker who used to sneeze in the morning becomes a worker whose chest is tight by mid-afternoon, and eventually becomes a worker who leaves the floor in a van.

The third is that it does not stop at the factory fence. When workers live in company housing, the production floor and the bedroom are one continuous system. Cleaning one end of it without the other always produces half a result, and half a result is what the symptom log at Sri Phatthana had been showing for years.

The World Health Organization treats indoor air quality as a genuine health determinant rather than a comfort issue, and Thailand's Department of Disease Control likewise identifies indoor allergens as a major driver of chronic respiratory complaints. For a plant with two hundred people in it, this stops being a welfare topic and becomes a production continuity topic.

The Buyer Audit That Turned Sneezing Into a Business Number

Sri Phatthana manufactures almost entirely for export. Its largest customer, a Dutch outdoor clothing brand that had been placing orders for seven years, accounted for roughly 46 percent of annual turnover. Like every large buyer in this industry, that brand sends independent auditors into its supplier factories once a year to assess labour conditions and worker safety.

17 November 2025, the day the auditors walked into the dormitory

Three auditors spent two full days on site. The part management had prepared hardest for was documentation: time records, payslips, fire drill certificates, accident logs. All of it passed without comment. The part nobody prepares for is the confidential worker interview. The auditors selected 46 workers at random and spoke to them in a room with no supervisor present.

One of the standard questions is whether the worker has any health complaint they believe is connected to their work or their accommodation. Of the 46 workers interviewed, 31 raised respiratory symptoms themselves, unprompted: morning sneezing, blocked noses that kept them awake, dry coughing after midnight, itchy eyes, and a feeling of not being able to fill their lungs in the afternoon. The lead auditor asked to walk through the dormitory that same evening, and asked to open two mattress covers and look at the foam.

What went into the report

The draft report arrived eleven days later. Wages, hours and documentation all cleared. One finding was raised at the level that requires urgent corrective action: an unusually high proportion of respiratory complaints in confidential worker interviews, combined with accommodation conditions showing accumulated fibre dust and no evidence of any deep cleaning of mattresses or curtains. The factory was given 30 days to submit a corrective action plan and 60 days to demonstrate measurable remediation.

Wirat Tangpipatphol, the fifty-one-year-old managing director who took the business over from his father in 2014, said afterwards that in twenty years he had prepared for every kind of audit question — working hours, fire exits, minimum age, chemical storage — and had never once imagined failing on the mattresses in his own dormitory.

12 December 2025, the order moves

Before the 60-day window had even closed, the brand's sourcing team emailed to say that the next winter jacket order — 18,000 units, worth 4.6 million baht — would be placed with a different factory for this round, and that Sri Phatthana would be reconsidered once the finding was closed and verified at a follow-up audit. The email did not contain the words dust mite anywhere. It contained the phrase unresolved worker health risk.

For a plant of 212 people, a single order like that does not disappear quietly into a spreadsheet. It means three weeks in which eight sewing lines are not fully loaded. It means machinists asking the HR office whether there will be a bonus this year.

The Real Cost: Health, Money, Reputation and People

The health bill

Between April and December 2025 the factory paid 96,500 baht in medical costs above social security cover: antihistamines, inhalers, lung function testing for 62 workers identified as higher risk, and two emergency consultations. That number does not include the sick days workers took out of their own entitlement, and it certainly does not include the people who never called in sick at all because they did not want to lose the attendance bonus, and then worked at half speed all day.

What the money does not show is the absence rate. Across the final quarter of 2025 it moved from 3.1 percent to 6.8 percent. On a factory of this size that means an average of nine to fourteen people missing from the lines every day. On a progressive bundle line, where each operator performs one step of a sequence, losing one person does not reduce output by one person's worth. It slows the entire line.

The money

When the accounts department put the full nine-month figure on the table in the January management meeting, the room went quiet for a while.

Reputation and people

The two things that worried Wirat most never appear in a set of accounts at all.

The first is standing with buyers. Contract apparel manufacturing is a smaller world than outsiders assume. Large buyers talk to each other, sourcing agents talk to everyone, and a factory that takes one worker-health finding is filed in the elevated-risk category for at least the next two audit cycles. That makes it harder to win new business from other customers as well, not just from the buyer who raised it.

The second is the workforce. Between August and December 2025, seventeen skilled machinists resigned. Three told HR plainly that they were moving to a factory with a better dormitory. A machinist who can sew a lined jacket to standard speed takes at least six months to train. Losing one is not losing one unit of labour. It is losing six months of investment that has already been spent.

Why Every Fix the Factory Tried Failed

Sri Phatthana did not sit still through 2025. Management tried a series of things. Here is each one, and why it did not work.

Blowing everything down with a compressed air gun every Friday evening. Fast, visible, and satisfying, and it removes nothing from the building. Compressed air converts settled lint and settled allergen into an aerosol, which lands back in the same places by Monday. This is relocating a problem, not solving it.

Two bag-filter industrial vacuums. The factory bought two large-canister machines at 12,000 baht each to clean under the machine tables. They picked up thread waste and fabric offcuts very well. They also discharged the finest particles straight out of the exhaust at high velocity — and the finest particles are precisely the dust mite allergen fraction. Anyone walking behind the machine got a more concentrated dose than before it was switched on.

Issuing surgical masks to everyone. Worth doing, and genuinely helpful up to a point. But a surgical mask has limited capture at very small particle sizes, and in a building that reaches thirty-five degrees by mid-afternoon, actual all-shift compliance is low. Most importantly, a mask does nothing at all while a worker is asleep on a dormitory mattress — which is the single longest continuous exposure of the twenty-four-hour cycle.

Installing six more extraction fans. This helped with heat, which was real. But increasing airflow in a building where every surface is a dust reservoir mostly increases the distribution of the thing you are trying to eliminate. Within a few months the fan blades and guards had themselves become excellent lint collectors.

Washing the dormitory mattress covers. The cover was never the reservoir. The four centimetres of foam underneath had been collecting skin flakes, sweat, lint and mite droppings for six years. Foam mattresses cannot go in a washing machine, and if you soak one and cannot dry it completely in Samut Prakan humidity, what you get is mould — a new and worse problem.

Pricing up 192 new mattresses. Purchasing came back with a quotation of 384,000 baht, excluding delivery and disposal of the old ones. The flaw is obvious once stated: if workers still walk into those rooms every night with factory lint in their hair and on their clothing, and the rooms still have no real ventilation, the new foam starts loading up in week one. And the curtains, the meeting room carpet and the showroom sofas would all still be exactly as they were.

Air fresheners and deodorising sprays in the dormitory. These mask the stale smell for a few hours. They remove precisely zero allergen from the foam, and the added moisture in a poorly ventilated room makes conditions slightly better for dust mites, not worse.

Every one of these approaches shares a single flaw. They all act on the surface, while the allergen that causes the symptoms is embedded deep in fibre. Getting it out requires equipment built for that specific job, and a method that does not return what it lifts back into the air.

The Answer: An On-Site Dust Mite Removal Service That Treats the Factory and the Dormitory Together

In the first week of January 2026 Uraiwan went looking for a provider that could work inside both the production building and the dormitory without 192 mattresses having to be transported anywhere. She found World Health Disinfection and called the same day. Her brief was specific: the work had to produce evidence she could put in front of the buyer's auditor, and it had to be finished inside a single weekend, because the lines could not stop for longer than that.

World Health Disinfection Co., Ltd. is the first company in Thailand to combine dust mite removal with full disinfection in a single visit. The service covers mattresses, sofas, carpets and curtains, it is performed on site, and the detail that mattered most to a factory with 48 dormitory rooms is this: curtains are cleaned while they are still hanging. Nothing has to be unhooked, taken down, bagged or sent away. For 48 rooms, that alone saves several working days of labour.

See the full dust mite removal service and pricing here. It is the same service used by hotels, clinics, schools and factories across Bangkok and the surrounding provinces for exactly this class of problem.

How the SIRENA System Dust Mite Machine Works

The core of the service is the SIRENA System, designed and developed in Canada and driven by a 1200-watt Italian cyclone motor. What separates it from the bag-filter industrial vacuums the factory already owned is not suction power. It is the filtration principle.

Water filtration. Instead of trapping debris in a bag that leaks its finest fraction out of the exhaust, the SIRENA draws everything directly into a water chamber. Dust, dirt, animal hair, lint, skin flakes and dust mite droppings are trapped in water, 100 percent, with no blow-back into the room. At the end of each area the technician empties the chamber in front of the customer. The line supervisor who watched the water come out of a six-year-old dormitory mattress said she would rather not see that again.

A HEPA filter down to 0.02 micron. Behind the water stage sits a HEPA filter with filtration down to 0.02 micron. Together the two stages remove up to 99.99 percent of allergens, and also capture pollen, dust, dirt, VOC gases, staphylococcus, bacteria, germs, black mould, pet hair, dust mites, tobacco smoke and food smells trapped in fibre.

Certification you can actually cite. The SIRENA System is certified by the Asthma Society of Canada, and carries Quality Tested, Certified Space Technology, Certified Vacuums, Dust Mite Proof, Certified TUV Rheinland, Certified Asthma and Allergy, Certified Go Green and Certified Eco Friendly marks. For a factory that has to submit a corrective action plan to a buyer's auditor, that list carries considerably more weight than a cleaning invoice.

It purifies the air while it works. Because the exhaust air has passed through water first, the machine functions as an air purifier and scent diffuser at the same time. A dormitory room after treatment smells clean, rather than smelling like the dust storm you get from an air gun.

For heavily soiled items the team also brings MASTER VACUUM equipment for deep washing of mattresses, sofas and carpets, pulling out stains, dirt and embedded dust that dry extraction alone cannot reach. Full machine details are on the SIRENA System product page.

10 Reasons a Garment Factory Should Use the WHD Dust Mite Removal Service

1. The team comes to you, and covers both buildings. No loading 192 mattresses onto a truck, no multi-day shutdown, no transit insurance. The work happens where the problem actually lives.

2. Dormitory curtains are cleaned without being taken down. Forty-eight rooms of curtains that had not been unhooked since 2019 were cleaned in place on their existing tracks, top to bottom. That saves both the labour of removal and the labour of rehanging.

3. Water filtration blows nothing back. Unlike the air gun and the bag vacuums the factory had been using, everything lifted goes into water, 100 percent. None of it returns to the air the workforce is breathing.

4. It reaches the foam core, not just the cover. The real allergen reservoir is inside the mattress. This is equipment designed specifically to extract it from the depth of the fibre.

5. Up to 99.99 percent allergen removal. Backed by certification from the Asthma Society of Canada and a list of independent marks that can be submitted as supporting evidence during an audit.

6. Disinfection is part of the same visit. WHD is the first in Thailand to combine dust mite removal with full disinfection in one service, with an add-on disinfectant spraying service that kills viruses, bacteria and mould in the same pass — which matters enormously in densely occupied shared accommodation.

7. Mould is handled at the same time. Humid, poorly ventilated dormitory rooms breed black mould just as happily as they breed dust mites. The same filtration captures both.

8. Stale odour is removed, not masked. Old sweat, foam smell and tobacco smoke held in curtain fabric are extracted rather than sprayed over. Workers notice this on the first night, and so does an auditor walking a corridor.

9. Visible, photographable evidence. The water chamber is emptied in front of you every time it is changed. That is both a way to convince 212 sceptical workers that something real happened, and a documented input to the corrective action plan sent back to the buyer.

10. It costs a fraction of replacing everything. Against 384,000 baht of new mattresses that would begin reloading immediately, and against a 4.6 million baht order that had already walked out of the door, a single service visit is not a difficult decision.

The Two Days It Actually Took: 17 and 18 January 2026

A team of six arrived on the Saturday morning, with the lines shut down for the weekend, and worked two full days in a sequence planned so that nothing already cleaned would be recontaminated by the next stage of the job.

• Saturday 07:30 — survey and baseline record. The technicians walked the production building, the fabric store, the cutting room, the meeting room, the customer showroom and all three dormitory floors. Humidity was measured in the fabric store and in sample rooms, and the interior of sample mattresses was photographed before anything was touched.
• Saturday 08:30 — third floor of the dormitory first. Work ran top floor down. Foam mattresses were lifted off the bunks one at a time and cleaned on both faces with the SIRENA System. Then the steel bunk frames, the timber edges and the floor space under the beds — which is where the heaviest lint accumulation in any dormitory room is found.
• Saturday 12:00 — the worst 44 mattresses. The 44 units in the poorest condition, most of them top bunks, were given an additional MASTER VACUUM deep wash. Across the two days the machine's water chamber was changed 38 times.
• Saturday 15:20 — curtains in all 48 rooms. Cleaned in place on their original tracks, from the top hem down to the bottom, without unhooking a single panel.
• Sunday 07:30 — fabric store and cutting room. The exposed surfaces of the rolls on the upper tiers, the steel racking, the floor beneath the racks and the cutting tables were all cleaned by water filtration instead of being blown down with compressed air.
• Sunday 11:00 — all eight sewing lines. Under the machine tables, the thread trays, the recesses under the machine beds, the tops of the electrical cabinets, every machinist's chair, and the cut-piece trolleys, treated point by point.
• Sunday 14:30 — meeting room and customer showroom. The meeting room carpet, three sofa sets and the curtains in both rooms. These are the rooms in which auditors and overseas customers sit on every single visit.
• Sunday 16:40 — disinfection and handover. The team applied disinfectant spraying across everything that had been treated, and handed over WELLGIENIC disinfectant wet wipes, which kill 99.99 percent of germs and bacteria including COVID-19, together with CHEMGENE HLD4H disinfectant spray, which kills viruses, fungi, bacteria, salmonella, mycobacteria, H1N1, COVID-19, pertussis, norovirus and influenza within one minute at 99.85 percent efficacy and protects for up to 14 days, as tested by the Department of Microbiology and Immunology.

On Monday 19 January 2026 all eight lines ran their normal schedule. Not one production day was lost to the work.

In the Managing Director's Words

I have run this factory for twelve years and I have prepared for every kind of customer audit there is — working hours, fire exits, paperwork. It never occurred to me that I would lose a 4.6 million baht order because of the mattresses in my own dormitory. What made me understand it was the water. They emptied that chamber in front of me thirty-eight times over two days, and what came out of the beds my people sleep in every night is not something I will forget. The auditor came back in March and closed the finding. In April the order came back bigger than before. We now budget for this twice a year — once before the rainy season, and once before the annual audit.

— Wirat Tangpipatphol, Managing Director, Sri Phatthana Garment Co., Ltd., Samut Prakan

How to Hold the Result: What Changed on the Floor Afterwards

A professional dust mite removal service resets both buildings to a clean baseline. Holding that baseline is a matter of daily routine. These are the things Sri Phatthana changed afterwards, and all of them are cheap.

• Compressed air guns were banned for area cleaning. Extraction replaced dispersal. This single rule change did more for indoor air quality than any piece of equipment the factory had bought, at essentially no cost.
• Work clothing was separated from sleeping areas. A changing point and laundry baskets were installed on the ground floor of the dormitory so that factory lint stops following people up the stairs and into the bunks every night.
• Rooms are ventilated every morning. Windows and wall fans open for at least thirty minutes before the shift. Humidity sealed into a closed room all day is the single condition dust mites need most.
• Cut-piece bundles no longer sit beside a line for more than two days. Cutting is now scheduled against sewing capacity, which shortens the time fabric spends lying still on a factory floor.
• Fabric stock is genuinely rotated. First in, first out is enforced, and rack cleaning is on a documented schedule that an auditor can inspect.
• Deep cleaning is an annual budget line. Shared dormitory mattresses in nightly use should be treated once or twice a year, and the visit should always be scheduled ahead of a buyer's audit date, not after it.

There is more on indoor allergens in the World Health Disinfection article library, background on indoor air quality from the World Health Organization, and guidance on allergy and respiratory disease from Thailand's Department of Disease Control. The full scope of work is set out on the dust mite removal and disinfection service page.

Do Not Lose the Next Order to Something You Cannot See

Dormitory mattresses, bunk frames, curtains, sofas, carpets and production floor areas — cleaned on site, with full disinfection, by the first company in Thailand to combine the two.

See the service and pricing — click here

Call 065-556-6294 | LINE @whd268

World Health Disinfection Co., Ltd. — 88 268 Kanlapaphruek Road, Bang Khae, Bangkok 10160

Frequently Asked Questions

How long does a factory of two hundred people take?

It depends entirely on the scope. At Sri Phatthana — 192 mattresses, 96 bunk beds, curtains in 48 rooms, a fabric store, a cutting room, eight sewing lines, plus the meeting room carpet and showroom sofas — it took a team of six two full days across a weekend, which meant no production days were lost. The team always surveys and quotes a realistic duration before a date is booked.

Do we have to stop the machines or close the plant?

Usually not. Most factories schedule the work for a weekend or outside shift hours. The sequence is planned so the dormitory is done before the production areas, to avoid recontaminating anything already cleaned, and because the system captures everything into water, there is no airborne dust settling onto fabric or work in progress on the lines.

Can dormitory curtains really be cleaned without taking them down?

Yes — cleaning curtains in place is central to this service. The team works from the top hem down to the bottom on the existing track, which makes it well suited to worker dormitories, hotels, showrooms and any building where removing and rehanging curtains carries a real labour cost.

Can this be used as evidence in a buyer's social compliance audit?

Many factories submit the scope of work, before-and-after photographs and the SIRENA System certification documents as part of a corrective action plan. The machine is certified by the Asthma Society of Canada and carries Certified TUV Rheinland, Certified Asthma and Allergy, Certified Go Green and Certified Eco Friendly marks, all of which are verifiable.

Is it safe for workers who already have asthma or allergies?

Yes. Air passes through water first and then through a HEPA filter rated down to 0.02 micron, so no dust or allergen is released back into the room during the work. That is the opposite of a bag vacuum or an air gun, both of which can make a sensitised person worse within minutes.

How often should a factory and dormitory be treated?

For shared accommodation in nightly use and a production building with constant fibre dust, once or twice a year is the sensible range. Schedule one visit ahead of the rainy season, when humidity peaks, and one ahead of the annual buyer audit. For ordinary homes, once or twice a year is likewise appropriate.

What is included free after the service?

Customers receive WELLGIENIC disinfectant wet wipes, which kill 99.99 percent of germs and bacteria including COVID-19, and CHEMGENE HLD4H disinfectant spray, which kills viruses, fungi, bacteria, salmonella, mycobacteria, H1N1, COVID-19, pertussis, norovirus and influenza within one minute at 99.85 percent efficacy and protects for up to 14 days.