Dust Mite Removal Service: How a Bangkok Muay Thai Gym Lost 41 Members to the Foam Under Its Ring Canvas

One hundred and eighty-four members. Two rings. Thirty-eight crash mats. Sixty-two pairs of shared gloves. Two hundred and forty square metres of foam flooring. And nobody in the gym suspected that the thing putting a fourteen-year-old fighter in an emergency room had been living, for eight years, in padding that never once dried out. This is what it cost them, and what an on-site dust mite removal service finally did about it in a single day.

The Evening a Fourteen-Year-Old Stopped Breathing in the Clinch

Saturday the seventh of February 2026, six in the evening, and Kiat Phupha Muay Thai Gym on Ramkhamhaeng Soi 60 in Hua Mak, Bang Kapi, was at its loudest hour of the day. Thirty-one people were on the floor. Four industrial fans were running flat out and achieving very little beyond stirring the same hot air in a circle. The thermometer nailed to the pillar by the water cooler read 34 degrees. The gym smelled the way every Muay Thai gym in Bangkok smells, which is to say of liniment, of leather, and of old sweat that has soaked into every single surface until nobody who trains there notices it any more.

Phumiphat Saengchan, fourteen years old, known on the cards as Phet Phum Kiat Phupha, was in his third round of clinch work on the big ring. He had been a gym kid since he was ten, had fought twenty-three times, won eighteen, and had a booking at Rangsit stadium at the end of the month. Halfway through the round, with his hands still behind his partner's neck, he let go, backed into the corner and started making a long thin whistle on every breath. His shoulders climbed. His lips went pale. Two trainers were through the ropes at the same moment. Two doses from his inhaler did nothing. Twenty minutes later he was in an emergency room off Lat Phrao, on a nebuliser, and he stayed overnight for observation. That bill came to 12,800 baht.

Surachai Prommalee is forty-seven. He fought at Lumpinee under the name Phet Phupha Kiat Muang Phichit, took 148 fights, and opened his own gym in 2017, twelve years after he hung up the gloves. Everyone in the soi calls him Kru Mee. He sat outside that emergency room until two in the morning telling himself the same sentence on a loop: he had pushed the boy too hard, too young, in heat like that. It was the only explanation he had.

Except Phum was not the only one. For five months the same complaints had been circling the gym. Sneezing fits that started the instant somebody climbed onto the canvas. Red, itching eyes after clinch rounds. A blocked nose on the morning after every training day. Itchy welts on forearms and necks, exactly where skin met canvas on the way down. Kru Ek and Kru Boy, the two full-time trainers, had both developed a dry night-time cough back in November 2025. And Marco Bianchi, a 31-year-old Italian who had flown in from Milan for a full three-month training block, packed up and left in week five. Before he went he posted one line in the gym's group chat: he had not been able to breathe properly since day ten, and he was very sorry to be going.

What all of these people had in common was not the training programme, not the coach and not their age. What they had in common was that every one of them pressed their body into the same foam, day after day. Foam that had been absorbing the sweat of hundreds of people since 2017 and had never, not once, been cleaned below its surface.

What Is Actually Living Under a Ring Canvas

A Muay Thai gym is a building in which almost every square metre exists to absorb impact, and the cheapest, toughest, most reliable way to absorb impact is foam. The problem is that foam which is good at absorbing impact is equally good at absorbing liquid. Kiat Phupha occupies 240 square metres, opens from six in the morning until nine at night, six days a week, and runs three classes a day. Somewhere between a hundred and a hundred and twenty bodies make contact with those surfaces every single day. When humidity was finally measured under the ring canvas in March, the readings came back between 82 and 88 percent, while the air a metre above the ring measured 61 percent. That gap of more than twenty points is the whole story of this article.

Two rings, and the sponge layer that can never dry

The gym has two rings: a six by six metre competition ring and a five by five metre training ring. A boxing ring is not a sheet of vinyl stretched over wood. It is a sandwich. Plywood deck at the bottom, then a compressed foam layer about two and a half centimetres thick, then a felt or heavy canvas layer, and only then the vinyl top sheet that everybody actually sees. Sweat that lands on that top sheet does not stay on it. It runs to the seams, through the eyelets at the corners, along the laced edges, and down into the foam underneath — foam which is then sealed, above and below, by waterproof material. There is no evaporation path. In eight years of operation the ring had been mopped daily with floor cleaner and had its top canvas replaced twice. The foam layer beneath had never been lifted, never been inspected, and never been cleaned.

Thirty-eight crash mats, eleven of them with split seams

The gym owned thirty-eight throw-and-fall mats, four to five centimetres of compressed foam wrapped in a synthetic leather skin. When those mats are new, the skin does a reasonable job of keeping fluid out. After years of takedowns, impacts and being dragged across the floor, the edge seams begin to gape and the surface starts to craze. On survey day, eleven of the thirty-eight had split seams or torn skin. Every split is a one-way valve: sweat goes in easily, and cannot come back out, because the rest of the mat is still sealed. The inside of those mats had become permanently damp foam held in warm darkness, which is not a metaphor — it is a precise description of the conditions dust mites need to breed.

Sixty-two pairs of gloves, and the equipment cupboard

The gym kept 62 pairs of house gloves for members to borrow, plus 24 pairs of focus pads, 45 pairs of shin guards and 12 body protectors. Structurally these are all the same object: layered foam inside a leather shell. The inside of a glove is a small cave that is completely dark, permanently warm, and soaked three times a day by three different pairs of hands. After the evening class everything went back into a closed wooden cupboard against the wall — no vents, no fan, no daylight. Kru Mee admitted, without much enthusiasm, that the gym's entire glove maintenance regime for eight years had consisted of spraying convenience-store deodoriser into each glove on Sunday evenings and then shutting the doors. Which is to say: adding moisture to a sealed, unventilated box once a week.

Two hundred and forty square metres of interlocking foam floor

The training floor outside the rings is laid with interlocking jigsaw foam tiles, 2.5 centimetres thick, covering all 240 square metres. Tiles lock together, and every lock is a channel. Sweat, spilled drinking water and mop water run into those channels every day and pool between the tiles and the bare concrete underneath, where there is no drainage and no sunlight. The floor had last been lifted and wiped in 2021. When tiles were pulled up on survey day, the underside was a grey-black tacky film mixed with skin flakes, hair, shreds of torn hand wrap, and rings of mould creeping in from the walls.

Damp fibre, darkness, body heat delivered a hundred-plus times a day, a constant rain of shed skin from friction, and no airflow beneath a waterproof skin. If somebody had deliberately set out to build a 240-square-metre dust mite farm in central Bangkok, they could not have improved on a Muay Thai gym maintained the ordinary way.

Why a Dust Mite Removal Service Matters More for Athletes Than for Anyone Else

Dust mites are arachnids rather than insects: eight legs, rounded bodies, milky white, and between 0.1 and 0.3 millimetres long, which makes them entirely invisible to the naked eye. They do not bite, and they do not carry disease the way a mosquito does. They live in damp, dark places and cling to fibres — mattresses, pillows, mosquito nets, curtains, upholstered furniture, and, just as happily, ring underlay, crash mats and glove padding.

The mite itself is not the problem. Its droppings are. Dust mite faecal particles contain proteins that behave as potent allergens, and when a sensitised person inhales them the body mounts a hypersensitivity response. The documented consequences include allergic rhinitis, conjunctivitis, asthma, dermatitis and itchy rashes, and chronic headaches. The World Health Organization treats indoor air quality as a genuine determinant of health rather than a comfort preference, and Thailand's Department of Disease Control similarly identifies indoor allergens as a major driver of chronic respiratory complaints.

For a person at a desk, that is unpleasant. For a person training at full output it is a different category of problem entirely, and the reason is mechanical. A person walking moves roughly 6 to 8 litres of air per minute. A person working full rounds on the pads moves 60 to 100 litres per minute. The volume of air crossing the airway increases more than tenfold, and so does the dose of allergen delivered with it. Worse, at high output people stop breathing through the nose and start breathing through the mouth, which bypasses the best natural filter the body has — nasal hair and nasal mucosa — and delivers particles straight to the lower airway.

Then there is the geometry of the sport itself. Almost every drill in Muay Thai puts a face within a few centimetres of a padded surface. Falling on a mat. Being thrown. Ground drills, push-ups, sit-ups on foam tiles, and clinch work in which your cheek rests on the shoulder of somebody who has just rolled across the canvas. And every time a body strikes foam, the compression drives the air inside that foam upward in a small invisible plume, carrying whatever is in there with it, directly into the face of the person breathing hardest in the building.

The doctor who assessed Phum after that night reached the conclusion Kru Mee had never once considered. The boy's skin prick test came back clearly positive for house dust mite. What he had was allergy-triggered asthma, not overtraining. The prescription was a controller inhaler, a rescue inhaler, three weeks off, and one additional instruction that changed everything: go and deal with the surfaces in the gym, because otherwise the medication is only managing a problem you are re-creating every evening.

The Real Cost: Health, Money, Reputation and Relationships

The health bill

Between October 2025 and March 2026 the gym and its members' families spent 34,700 baht on respiratory and skin complaints linked to the gym. That breaks down as 12,800 baht for Phum's emergency admission and overnight stay, 9,400 baht for his allergy testing and ongoing asthma controller medication, 7,100 baht in clinic visits and antihistamines for Kru Ek and Kru Boy, and 5,400 baht of rash creams and eye drops that Kru Mee simply kept stocked in the gym's medicine box for anyone who needed them. None of that captures the days when somebody took an antihistamine, said nothing, and trained anyway — which, Kru Mee suspects, was most days.

The money

Monthly membership at Kiat Phupha is 2,500 baht for Thai members and 4,500 baht for foreign members, with drop-in sessions at 400 baht. At the start of October 2025 the gym had 184 monthly members. By the end of February 2026 it had 143. Forty-one people gone in five months, and among them nine foreign members who had prepaid long training blocks and asked to cancel part way through. Kru Mee refunded every one of them in full rather than let the matter turn into a public argument. The arithmetic came out like this.

For scale: a gym of this size clears somewhere between 60,000 and 80,000 baht of net profit in a good month. So 685,200 baht is very close to an entire year of profit, surrendered to something nobody in the building could see and nobody could name.

The reputation

A Bangkok Muay Thai gym survives on two things: word of mouth in the soi, and the online rating that combat-sports tourists check before they book a flight. Kiat Phupha had held a 4.8 since 2021. Between November 2025 and February 2026 it received fourteen new reviews, nine of which were two or three stars, and almost every one of them described the same three things: a stale smell, visible dust in the air during training, and a blocked nose afterwards. The overall rating fell to 3.9 inside ten weeks. Kru Mee did not reply to a single review, because he did not know what to say. He knew the reviewers were right.

The relationships

This is the part outsiders never see and the part that hurt most. A Muay Thai gym is not a fitness club where strangers arrive in headphones. It is a family. Several of the gym kids eat dinner there, nap there in the afternoon, and call Kru Mee dad. Once the children started getting ill, the parents started asking questions. Once the trainers were coughing every night, Kru Ek's wife started asking him to find work elsewhere. And when Marco — who everybody liked — left early, the atmosphere in the building changed in a way you could feel from the door. Kru Mee says that one night in February he sat alone in the gym at ten o'clock, looked at the ring he had built with every baht he had saved from fighting, and seriously considered closing it and going back to driving a delivery truck.

Why Every Fix They Tried Failed

It should be said clearly that Kru Mee is not a lazy operator. He worked on this for five months, and everything he tried is what gym owners across the country try. Here is what the gym did, and the physical reason none of it worked.

They disinfected the ring canvas daily. From December the gym switched from ordinary floor cleaner to a concentrated disinfectant and wiped the canvas twice a day. The vinyl top surface did get cleaner. But the allergen was not on the vinyl. It was two layers down, in the foam. Wiping a surface cannot reach a reservoir beneath two sealed layers, and the water used for wiping seeped into the seams and added humidity to the layer that least needed it.

They dragged the mats into the sun. Every Sunday morning the gym kids hauled crash mats out to the front of the soi for three or four hours. Heat does kill some mites at the surface. But the allergenic material — droppings and body fragments already embedded in the foam — is not alive, so there is nothing to kill. It remains exactly where it was, particle for particle. And sunlight does not penetrate a thick synthetic leather skin to reach the core of a mat anyway.

They bought a vacuum cleaner. In January the gym spent 4,500 baht on a bagged vacuum and ran it over the floor tiles and mats every morning. Members then reported that symptoms got worse, which is exactly what should be expected. An ordinary dry vacuum captures coarse debris in the bag and exhausts the finest particles back into the room at speed — and the finest fraction is precisely the allergenic fraction. In practical terms, the gym was aerosolising a concentrated cloud of the thing making everybody ill, immediately before the morning class.

They sprayed deodoriser into the gloves and the cupboard. This one had been running for eight years. The spray masks odour for roughly two days. It removes nothing from the foam inside a glove, and the liquid it adds raises humidity inside an enclosed space that was already too humid. It is a near-perfect example of a fix that makes the underlying problem worse while making people feel it has been handled.

They replaced twenty pairs of gloves. That cost 46,000 baht in February. Symptoms improved for about ten days and then returned. The reason is simple: gloves were never the main reservoir, only a small share of it. Two rings of sweat-logged underlay and thirty-eight mats were untouched, and the new gloves began loading up immediately in an unchanged environment.

They priced up gutting the gym. Kru Mee obtained a quotation to replace the foam under both rings, replace all thirty-eight crash mats, and lift and replace all 240 square metres of floor tiles. It came to more than 420,000 baht, plus a minimum of ten days closed, which meant more lost income on top. Most importantly, accumulation would have restarted with the very first class, because nothing about ventilation or maintenance practice would have changed.

Every one of those approaches shares a single flaw. They treat the surface. The allergen lives in the depth of the foam, and extracting it from that depth requires equipment designed for exactly that job — not a mop and an aerosol can.

The Answer: An On-Site Dust Mite Removal Service That Comes Into the Gym

In mid-March 2026 it was Phum's mother who did the research. She searched for a dust mite removal service, found World Health Disinfection, and made the call on Kru Mee's behalf because he is not a man who enjoys phoning companies. What the gym needed was specific: somebody willing to bring the equipment into the building, rather than a shop that wanted 38 mats and 62 pairs of gloves delivered to a depot. And it had to be finished in a single day, because Monday is the only day the gym closes.

World Health Disinfection Co., Ltd. is the first company in Thailand to combine full dust mite removal with complete disinfection in a single on-site visit. The service covers mattresses, sofas, carpets and curtains, and curtains are treated exactly where they hang — nothing is dismantled, taken down or sent away. The same principle applies directly to a Muay Thai gym, because ring underlay, crash mats, glove padding and foam flooring are all porous materials that hold allergen at depth, which makes them no different in kind from the core of a mattress.

See the full dust mite removal service and pricing here — the same service used by hotels, clinics, schools and fitness studios across Bangkok and the provinces for exactly this class of problem.

How the SIRENA System Machine Actually Works

The core of the service is the SIRENA System, a machine designed and developed in Canada and driven by an Italian cyclone motor rated at 1200 watts. What separates it from a domestic vacuum is not raw suction. It is the filtration principle behind it.

Water filtration. Rather than trapping debris in a paper bag that leaks fine particles back out through the exhaust, SIRENA draws everything it lifts straight into a water chamber. Dust, dirt, pet hair, skin flakes and mite droppings are captured in water at 100 percent — there is no blow-back into the room at all. When the job is done, the technician empties the chamber in front of you. For a gym owner who has spent five months arguing with himself that his surfaces were clean enough, the water after the first crash mat is an argument that cannot be answered.

HEPA filtration down to 0.02 micron. Behind the water stage sits a HEPA filter that brings filtration down to 0.02 micron. Working together, the two stages remove 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 trapped food odours. That list reads almost exactly like an inventory of what accumulates in an eight-year-old Muay Thai gym.

Certification that can be checked. 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 gym with an asthmatic child in its care, that is not marketing material. It is what you show the parents.

It purifies the air while it works. Because exhaust air passes through water first, the machine functions as an air purifier and scent diffuser during operation. A treated room genuinely smells clean afterwards, rather than filling with the dust cloud the gym produced every time it used its own vacuum.

For heavily soiled items the team also brings a MASTER VACUUM unit for deep washing of mattresses, sofas and carpets, lifting stains, ground-in dirt and embedded dust that a dry pass cannot reach. In the gym job this unit did most of its work on the split-seam crash mats and on the foam layer beneath the ring canvas. Full details are on the SIRENA System product page.

10 Reasons Every Muay Thai Gym Should Book This Dust Mite Removal Service

1. The team comes into the gym. Two rings that cannot be moved, thirty-eight mats too heavy to load into a pickup, and a floor that is laid in place — all of it is treated where it lives. Nothing is dismantled, transported, or stored somewhere while you wait.

2. It reaches the foam, not just the vinyl. The gym's entire problem sat two layers below the visible surface. This is equipment built specifically to extract allergen from the depth of porous material, not a tool that can only polish a skin.

3. Water filtration means nothing is blown back. The opposite of the vacuum the gym bought for itself: 100 percent of what is lifted ends up in water, not back in air that people are inhaling at nearly a hundred litres a minute.

4. Verified 99.99 percent allergen removal. The machine carries Asthma Society of Canada certification and multiple independent marks — which is something an owner can hand straight to a worried parent.

5. Gloves and protective gear are treated too. Gloves, pads, shin guards and body protectors are all sweat-loaded foam in a leather shell. They are the surfaces people forget, and they are the surfaces that sit closest to the face.

6. Disinfection is part of the same visit. World Health Disinfection is the first company in Thailand to combine mite removal with full disinfection in one job, and the add-on disinfectant spraying kills viruses, bacteria and mould in the same session — which matters in a place where skin touches skin all day.

7. Mould is dealt with at the same time. The space under foam tiles, humid and permanently sunless, grows mould as readily as it grows mites, and the system captures both in one pass.

8. The smell actually leaves. The stale smell is what drives the bad reviews. Removing the source is a fundamentally different act from spraying over it, and a prospective member walking in for the first time can tell the difference within one step of the door.

9. You see the evidence yourself. The water chamber is emptied in front of you at every change, which matters enormously when you need a hundred-plus members and dozens of families to believe the problem is genuinely solved.

10. It costs a fraction of gutting the building. Against a 420,000 baht refit quotation plus ten days closed, one service visit scheduled on the day the gym is already shut is not a difficult decision.

Service Day: Monday 23 March 2026

The gym chose its weekly closing day. A five-person team arrived at seven in the morning. The work took eleven hours and followed the order set out during the survey.

• 07:00 — Survey and measurement. The technicians walked the whole floor, measured humidity beneath both ring canvases, opened the glove cupboard, lifted floor tiles at four points, counted eleven mats with split seams, and photographed everything before a single machine was switched on.
• 07:40 — The big ring. The vinyl was unhooked on all four sides, the felt layer lifted, and the foam underlay treated on both faces with the SIRENA System, followed by deep washing with MASTER VACUUM across the centre third of the ring where sweat loading is heaviest. The water was changed four times on that ring alone.
• 10:15 — The training ring. The same process end to end, plus the ropes, the corner posts and the eight padded corner covers that had not come off since the ring was installed.
• 12:00 — Thirty-eight crash mats. Mats were laid out on ground sheets in the forecourt and treated one at a time on both faces. The eleven with split seams received additional deep washing, because those are the ones where fluid had reached the core.
• 14:30 — Gloves and protective equipment. Sixty-two pairs of gloves, twenty-four pairs of pads, forty-five pairs of shin guards and twelve body protectors were treated individually, inside and out. The empty cupboard was then vacuumed and disinfected before anything went back in.
• 16:00 — The foam floor. Tiles were lifted zone by zone and the tops, undersides, interlocking channels and the bare concrete below were all treated before the floor was relaid. Nine heavy bags and the parents' waiting sofa by the entrance were done in the same pass.
• 18:00 — Disinfection and handover. Disinfectant spraying was applied across every treated area, and the team left 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, protecting for up to 14 days, tested by the Department of Microbiology and Immunology.

Kru Mee says the moment he remembers best was not the handover. It was ten in the morning, when the technician emptied the chamber after doing half of the big ring's underlay. He looked at it for about three seconds, then walked outside and smoked a cigarette without saying anything to anyone.

In the Owner's Words

I have been fighting since I was nine years old. I always believed that if something was hurting people, I would be able to see it, and I would be able to hit it. It cost me more than six hundred thousand baht and five months of not sleeping to accept that the thing hurting my kids was foam I had walked on every day for eight years. When they emptied that first tank for me I did not say anything, because I was ashamed. That water came out of the ring I tell every child to bow to before they climb in. Two weeks later Phum was training again, and in May he fought and he won. We book the service every six months now, and I pin the receipt on the board by the door so every parent can see it.

— Surachai Prommalee, owner, Kiat Phupha Muay Thai Gym, Ramkhamhaeng Soi 60, Bang Kapi, Bangkok

Keeping a Gym Clean Between Visits

A professional dust mite removal service resets every surface to a clean baseline. Holding that baseline for as long as possible is a matter of daily habit, and these are the habits Kiat Phupha adopted after 23 March.

• Air the ring once a week. Unhook one side, fold the canvas back over half the ring for two hours on the closing day, and put a fan on the exposed foam. Kru Mee says that if he had known one thing eight years ago, this would have been it.
• Stop storing gloves in a sealed cupboard. The gym replaced the closed wooden unit with open shelving and a fan blowing across it, and everyone now racks gloves cuff-up rather than stacking them face down.
• Repair split seams the day you notice them. A one-centimetre tear today is the entry point for litres of sweat over a year. A few hundred baht of vinyl repair tape is far cheaper than replacing a mat.
• Lift the floor tiles quarterly. It does not have to happen all at once; one zone per week is enough. The important part is letting the concrete underneath dry completely before the tiles go back down.
• Retire the bagged vacuum. A vacuum without fully sealed filtration simply redistributes allergen around the room before class starts, which is what the gym did unknowingly for the whole of January.

More on indoor allergens and on caring for mattresses, sofas, carpets and curtains is collected in the World Health Disinfection article library, and the full range of services is set out on the company home page. Broader guidance on indoor air quality is published by the World Health Organization, and Thai-language advice on allergy and respiratory illness is available from the Department of Disease Control.

Do Not Lose Another Member to Something You Cannot See

Ring canvas and underlay, crash mats, gloves and protective gear, foam flooring, mattresses, sofas, carpets and curtains — treated on site, with full disinfection included, by the first company in Thailand to combine both in a single visit.

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 dust mite removal service visit to a gym take?

It depends entirely on volume. A single bedroom with one mattress and a pair of curtains is usually under two hours. The Kiat Phupha job — two rings, thirty-eight crash mats, more than one hundred and forty pieces of gloves and protective equipment, and 240 square metres of foam flooring — took a five-person team eleven hours in one day. The team surveys and sequences the work before booking, so a gym normally only has to close on the day it is already closed.

Does the ring canvas have to come off, and will anything be damaged?

Where the problem sits in the foam underlay, the technicians unhook only the sides needed to reach it and re-tension the canvas properly afterwards. The process does not damage the canvas or the ring frame. For routine maintenance visits, where the underlay does not need opening, the canvas surface and equipment can simply be treated in place with nothing dismantled at all.

Is it safe for children and for people with asthma?

The SIRENA System is certified by the Asthma Society of Canada and carries Certified Asthma and Allergy, Certified Go Green and Certified Eco Friendly marks. Because filtration runs through water first and then a HEPA stage down to 0.02 micron, nothing is exhausted back into the room while the work is happening — which is the exact opposite of what a domestic vacuum does.

Can gloves and pads really be cleaned without ruining them?

Yes, and this is one of the most important parts of a gym job, because the inside of a glove is sweat-loaded foam sitting close to the face. Each item is treated inside and out using a method appropriate to leather and synthetic shells, and the storage cupboard or rack is cleaned and disinfected before anything goes back in, so clean equipment is not returned into a contaminated space.

How often should a gym or fitness studio book the service?

For foam surfaces taking a hundred or more body contacts a day in Thai heat and humidity, every six months is a sensible minimum. A gym open seven days a week, or one that runs residential fight camps, is better served every four months. For an ordinary home, once or twice a year is typical.

What is included free with the service?

After the work is finished you 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, as tested by the Department of Microbiology and Immunology.

We are not a gym — can a home or condo use the same service?

Absolutely. The service was built around mattresses, sofas, carpets and curtains, with curtains treated in place on the rail rather than taken down. The gym application works because all of those items and all of a gym's padding are the same thing in engineering terms: porous material holding allergen at depth.