A story from the field: the morning Prae rolled up her shutter again

Prae has run a small beauty and nail salon in a side street near Pak Nam, in Mueang Samut Prakan, for almost ten years. It is a single-storey shophouse unit. At the front there are three styling chairs, two reclining shampoo stations and four nail tables, plus a long waiting sofa where regulars sit and chat while they wait for their turn. At the back is a small storeroom stacked with towels, shoulder capes, boxes of hair color and spare bottles of shampoo and treatment. In early October 2026, runoff from the north arrived at the same time as high tides from the Gulf, and water sat in her street for almost a week. Inside the salon it reached roughly shin height.

When the water finally drained away, Prae pulled up the steel shutter and the first thing that hit her was not the scent of shampoo or perfume her clients know. It was a heavy, damp, musty smell mixed with river mud and a sour odor coming from a basket of towels that had soaked in floodwater for days. The faux-leather styling chairs looked fine from the outside, but when she pressed down on a seat, cloudy water seeped out of the seams. The waiting sofa had grey-green mold spots along its edges. Shoulder capes that had been hanging too low were covered in black dots. The pale pink paint on the lower part of the walls now carried a tide line, with fuzzy mold creeping up above it.

What worried her most was a message from a loyal client on LINE: "Let me know when you reopen, but will the shop be clean enough? I am scared of getting a fungal infection on my scalp." A beauty business sells a feeling of cleanliness, freshness and relaxation. If a client walks in and smells damp, or notices mold on a cushion, years of trust can disappear in a single visit. Prae knew that wiping things down and spraying air freshener would not be enough, but she did not know what would be.

Prae's situation is shared by hundreds of small salon owners across Samut Prakan this season, from Pak Nam and Thai Ban to Bang Mueang, Samrong and the busy streets around the provincial hall. This article walks through why salons are a special case after a flood, why the usual quick fixes fail, and how World Health Disinfection (WHD) combines disinfection fogging with ozone shock treatment to bring a salon back to a state where both the owner and the clients feel confident again.

Why salons, hair shops and nail bars are especially vulnerable after a flood

A salon is very different from an ordinary retail shop. In a clothing store, customers mostly look and touch a few items. In a salon, customers are in physical contact with the space for long periods of time. Their head rests in a shampoo bowl, their back presses into a padded chair, their hands lie on a nail table, their feet soak in a pedicure basin and their face is wrapped in a towel. Every one of those contact points is a possible route for floodwater bacteria and mold spores to reach a client if cleaning does not go deep enough.

Towels and shoulder capes. Cotton towels hold an enormous amount of water. Once they have soaked in floodwater and then been left in a closed, humid room, bacteria and mold multiply fast. The sour, rotten smell you notice is the by-product of microbes breaking down organic matter in the fibers. A normal wash cycle may not remove it, and towels that already show deep black mold staining are usually not worth saving.

Styling chairs and shampoo chairs. The outside is easy-to-wipe vinyl or faux leather, but the inside is polyurethane foam that acts like a sponge. Floodwater trapped inside the foam does not dry quickly, especially in the humid coastal climate of Samut Prakan. Every time someone sits down, moisture and odor are squeezed out through the stitching. Meanwhile mold keeps growing from the inside out, even when the surface looks spotless.

Shampoo basins and drains. Floodwater can push back up through drains, leaving silt and contamination inside pipes and traps. The first time the taps are turned on again, a foul smell rises from exactly the spot where a client's head and face will be. Without disinfection, this area becomes the most noticeable source of complaints.

Nail tables and foot spa basins. Nail salons use metal tools, files, buffers and foot basins. If these were exposed to floodwater and are not cleaned and disinfected properly, there is a higher risk of skin and nail infections, particularly for clients with small cuts around the cuticles. Disposable items such as files and buffers that touched floodwater should simply be thrown away.

The back storeroom. It is usually windowless with almost no air movement. Cardboard boxes that got wet are an ideal food source for mold. When the air conditioner is switched back on, it pulls musty air from this room and spreads it through the whole salon, which is why many owners find the smell returns every morning even after a full day of cleaning.

Air conditioners and ceiling panels. Even if the water never reached the AC unit, the room was extremely humid for days. Filters, coils and the space above gypsum ceiling panels can develop mold that is invisible from below but releases odor and spores every time the system runs.

The hidden costs: health, money, reputation and time

Health. Floodwater is frequently mixed with sewage and waste. It can carry bacteria that cause diarrhea and stomach illness, and in areas where rats live there is a risk of leptospirosis, which can enter the body through cuts on hands or feet that come into contact with contaminated water or mud. Stylists and nail technicians who clean the salon with bare hands are at particular risk. Mold spores floating in the air can also trigger allergies, sneezing, blocked noses and asthma in both staff and clients. Someone reclining for a 45-minute hair treatment or a long color session breathes the salon air deeply for a long time, so the indoor air quality matters even more than in a typical shop.

Money. A salon lives on daily income. Every day the doors stay closed means lost revenue, while rent, staff wages and installment payments on equipment keep coming. It is tempting to reopen as quickly as possible, but if the smell and mold are not dealt with properly and clients do not come back, the financial damage lasts far longer than one extra day of closure spent doing the job right.

Reputation. Beauty clients talk to each other, in LINE groups, on Facebook and on review apps. A single line such as "the salon smelled musty" or "I saw mold on the chair" can stop new clients from trying the salon and push regulars to one of the many competitors nearby. In a crowded market like Mueang Samut Prakan, where there are salons on almost every street, reputation is everything.

Time. Most salon owners wear many hats: stylist, manager, cashier, marketer and cleaner. Trial-and-error cleaning, scrubbing the same surfaces again and again only to find the odor back after the shutter has been down overnight, drains both time and morale. This is especially hard after a flood, when owners also have to repair their own homes at the same time.

Why the usual quick fixes do not work

Bleach wipes and nothing else. Bleach can clean hard, non-porous surfaces, but it does not penetrate the foam inside chair cushions, it does not reach the cavity behind a shampoo bowl and it can fade or damage faux leather, fabrics and paint. Its strong chlorine smell also makes clients uncomfortable, which is the opposite of the calm, pleasant atmosphere a salon wants to create. Mixing bleach with other cleaning products can also release dangerous fumes in a small, closed shop.

Fans and open doors. Moving air helps surfaces dry, but in the rainy season near the coast the outside air is already saturated with moisture. Foam, wall cavities and storeroom corners dry very slowly. Fans can even blow mold spores around the salon, spreading the problem rather than solving it.

Air fresheners, reed diffusers and scented candles. These only cover odors for a while; they do not remove the source. When the fragrance fades, the musty smell returns, and the combination of artificial perfume and mildew often smells worse than either one alone. Clients with sensitive noses notice immediately.

Painting over the stains straight away. If the wall is still damp and mold is still alive under the surface, new paint simply traps it. Within a few weeks the paint bubbles and black spots come back, and the owner pays for painting twice.

Steam cleaning chairs only. Steam can freshen surfaces, but it adds even more moisture to foam that is already wet. Without proper drying and a treatment that reaches deep into the material, it can actually feed the mold.

The solution: Chemgene HLD4H disinfection fogging + ozone shock treatment

World Health Disinfection uses two steps that complement each other. The first is our disinfection spraying service using Chemgene HLD4H, a high-level disinfectant, delivered through ULV (ultra-low-volume) fogging equipment. The machine breaks the liquid into a very fine mist that drifts into places a cloth cannot reach: under styling chairs, behind shampoo bowls, around the legs of nail tables, along shelving in the storeroom and into the gaps of the reception counter. This reduces bacteria, viruses and fungi on surfaces throughout the salon, without leaving surfaces soaking wet.

The second step is our ozone treatment service. Ozone is a gas with strong oxidizing power. Because it is a gas, it spreads through the entire room and penetrates fabric, foam and the joints of furniture. It helps destroy mold spores and breaks down the odor molecules that cause the musty smell, rather than covering them up. After treatment, ozone naturally breaks back down into oxygen, so there is no lingering chemical perfume to clash with the scent of the salon's own products.

Together, the two steps deal with what you can touch and what you can smell. Fogging addresses the surfaces clients and staff touch; ozone addresses the air, the fabrics and the deep parts of soft furnishings where odor and spores hide.

Our step-by-step process for beauty businesses

1. Site survey. Our team checks the size of the salon, the number of rooms, how high the water reached, what the chairs and sofas are made of, and how the air conditioning works. This lets us plan the right amount of disinfectant and the right ozone dose and duration.
2. Mud clean-up and sorting advice. We advise on removing mud from floors, which towels and capes to wash and which to throw out, which opened products to discard and which electrical tools to unplug, such as hair dryers, straighteners and UV nail lamps.
3. ULV disinfection fogging. Chemgene HLD4H is fogged across floors, the flood-affected parts of walls, chairs, shampoo stations, nail tables, foot spa basins, counters and the storeroom.
4. Ozone shock treatment. The salon is sealed and the ozone generator runs for a period matched to the room volume and odor level. Nobody, no pets and no plants may be inside during this stage.
5. Ventilation. When the treatment time is complete, doors and windows are opened and fans used so the remaining ozone breaks down before anyone goes back in.
6. Re-check and aftercare advice. We check the smell and any spots that are still damp, and give practical advice on humidity control and what to watch over the following weeks.

Ozone safety: During treatment there must be no people, pets or plants in the space, and the area must be ventilated properly before anyone returns. Our team controls the ozone dose to suit the room size. Electronics that are sensitive to moisture or ozone, such as the cash register, booking tablets and UV or LED nail lamps, should be unplugged and covered or moved out before treatment. Some rubber items and delicate decorative pieces, such as framed artwork, should also be covered or removed.

10 reasons Samut Prakan salons choose professional recovery

1. Clients smell the salon before they see it. Ozone treatment breaks down musty odor at the source, so the first impression is clean again.
2. It reaches inside chair cushions. Ozone gas penetrates foam far deeper than any surface wipe.
3. It protects scalps and skin. Every contact surface receives thorough disinfection spraying.
4. It uses a high-level disinfectant. Chemgene HLD4H works on many surface types without the harsh chlorine smell.
5. ULV fog gets into corners. Under basins, behind cabinets and along product shelves.
6. No chemical scent left behind. Ozone reverts to oxygen; read more about ozone odor and residue removal.
7. Shorter closure. Most jobs are completed in a single day including ventilation time, depending on salon size.
8. Less chance of mold coming back. Especially when combined with humidity control and done before repainting or reupholstering.
9. Safer for staff. No hours of scrubbing in a closed, moldy room without proper protection.
10. Confidence to tell clients. You can honestly say the salon has been disinfected and ozone-treated, and keep it that way with the Chemgene HLD4H spray between clients.

In the owner's words

"At first I thought washing the towels, wiping the chairs and spraying something nice would be enough. But every time the shutter was down overnight, the smell came back. After the team fogged and ozone-treated the salon and we ventilated as they told us, the next morning the musty smell was mostly gone. That was when I felt brave enough to message my clients that we were open again."

— Prae (pseudonym), beauty and nail salon owner, Mueang Samut Prakan, a scenario from the field

Checklist: preparing your salon before our team arrives

• Always wear rubber gloves, boots and a mask when shoveling mud, especially if you have any cuts on your hands or feet.
• Remove as much mud as possible and rinse floors with clean water first. Disinfectants work best on surfaces that are not covered in thick dirt.
• Sort towels, capes and facial bed sheets. Anything with deep black mold stains, or that still smells after washing, should go.
• Discard opened products that touched floodwater: shampoos, creams, hair color, nail polish, cotton pads and disposable files.
• Unplug dryers, straighteners and nail lamps, and ask an electrician to check the wiring before you switch anything back on.
• Leave cabinet doors and drawers open so fog and ozone can reach the inside.
• Take out potted plants and any aquarium, and let neighbors in adjoining shophouses know if your units share air gaps or ventilation.
• Photograph damage for insurance or landlord records before items are thrown away.

After the treatment, keep humidity under control. Use the air conditioner's dry mode or a dehumidifier, clean the AC filters, wipe chairs with disinfectant between clients and store freshly washed towels in a closed, completely dry cabinet. If any new mold spots appear, deal with them immediately before they spread. Many salons find that a short follow-up ozone session a few weeks later is useful if the building took a lot of water, but our team will only recommend it if your situation needs it.

Rebuilding client trust after the reopening

Cleaning the salon is only half of the story. The other half is telling clients what you did, in a calm and honest way. A short post or LINE message explaining that the salon was cleaned, disinfected with a high-level disinfectant and ozone-treated to remove mold and odor goes a long way. Avoid exaggerated claims; simply describe the steps. Inside the salon, small visible habits matter: fresh towels taken from a closed cabinet in front of the client, chairs wiped down between appointments, single-use files opened from a sealed pack and a clean, neutral smell at the door.

Clients who were worried about scalp infections or allergies are often reassured when they can see that the owner took the problem seriously. Many will come back sooner than you expect, and they will tell their friends the salon is safe again.

Frequently asked questions

Q: Will ozone damage hair color or products in my stockroom?
A: Products that are still properly sealed are generally not affected, but to be safe our team will suggest storing stock in closed cabinets or moving it out before treatment. Opened products that came into contact with floodwater should be discarded anyway.

Q: Do I have to replace every chair cushion that soaked up water?
A: It depends on the damage. If the foam is still holding a lot of water or mold is visibly seeping out, the foam or upholstery may need replacing. Disinfection fogging and ozone treatment greatly reduce germs and odor, but they cannot restore foam that has physically broken down.

Q: How long do we need to stay out of the salon during ozone treatment?
A: That depends on the size of the space and how strong the odor is, including both treatment and ventilation time. Our team will tell you when it is safe to return after the survey. No people, pets or plants may be inside during treatment.

Q: My nail salon has UV lamps and electric nail drills. What should I do?
A: Unplug, cover or remove moisture-sensitive electrical devices beforehand. We avoid spraying directly into equipment and keep the ozone dose appropriate for the room.

Q: Can I open to clients immediately after the treatment?
A: Once the ventilation time our team gives you has passed and you have wiped down the main contact surfaces again, you can reopen. Please make sure your electrical and plumbing systems have also been checked.

Q: Which areas of Samut Prakan do you cover?
A: We serve Mueang Samut Prakan, Pak Nam, Bang Phli, Bang Bo, Phra Pradaeng, Phra Samut Chedi, Bang Sao Thong and nearby areas. Contact us by phone or LINE to check availability.

Bring back a fresh, clean salon your clients trust

Talk to World Health Disinfection about removing musty odor and mold and disinfecting your beauty salon, hair salon or nail shop in Mueang Samut Prakan.

Book Ozone Treatment – Click Here

See Disinfection Service – Click Here

Call 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com

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• Ozone odor and chemical residue removal
• Dust mite removal for sofas and cushions
• Chemgene HLD4H disinfectant spray 750 ml
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Sources: WHO – Floods and health and Department of Disease Control, Thailand