A Story From the Field: The Croissant Class That Had to Wait

Chef Prae is forty-one and runs a small cooking and baking studio on the ground floor of a commercial building down a quiet side street in Sathorn. The room is built around eight student stations, each with its own electric hob, sink and drawer of tools. Two large deck ovens stand along the back wall, next to a tall ingredient fridge. Behind a door at the far end is a windowless dry store full of flour, sugar, cocoa and nuts, and near the entrance there is a cozy corner with a fabric sofa where students sit to taste what they have made. Her customers are a lively mix: office workers from Sathorn and Silom who come in after work, visitors from overseas who book Thai cooking classes, and companies that reserve the whole studio for team-building baking sessions.

Several nights of torrential rain sent water from the street and the drains into the studio. It came up almost to ankle height and stayed for a day and a half. Chef Prae and her assistant pushed the water out, mopped the floor, scrubbed every station, and planned to go ahead with a fully booked croissant class the following weekend.

Two days before that class, she opened the door to the dry store and instinctively stepped back. The damp, musty smell was far stronger than she expected. Bags of flour on the bottom shelf had water stains and grey-green spots. The row of aprons hanging ready for students smelled like laundry that had never quite dried. Inside the drawers under the stations, where she kept rubber spatulas and silicone baking mats, there was still a film of standing water. Her assistant started coughing and sneezing every time she went into the store. Chef Prae knew at once that if she opened in that condition, both the flavor of the pastries and her students' trust would suffer. She picked up the phone and began rescheduling.

Many small cooking studios and baking schools in Sathorn, Silom, Yannawa and Bang Rak have faced something similar since the water receded in 2026. A teaching kitchen is different from an ordinary restaurant kitchen in one crucial way: strangers rotate through it every day, share the same tools, and then eat what they have made in that very room. Cleanliness is therefore a health issue and a reputation issue at the same time.

The Particular Risk Points in a Teaching Kitchen After a Flood

• The flour and dry goods store: Flour, sugar, cocoa powder and nuts absorb moisture readily. Dry stores are usually closed rooms without windows. When humidity stays high after the water goes down, mold grows quickly and the musty smell transfers to whatever stock remains.
• Multiple student stations: Drawers, under-counter cupboards and the gaps between counters and walls are where water lingers and where a cloth struggles to reach. The more stations you have, the more of these hidden pockets there are.
• Shared tools: Chopping boards, ladles, spatulas, silicone mats, cake tins and baking trays are handled by dozens of students every week. Anything that sat in floodwater has to be sorted and cleaned seriously.
• Aprons, hand towels and table cloths: Fabric hanging in a damp room soaks up musty odors even if it never touched the water.
• Fridges and freezers: If the power went off or water reached the unit, the contents may be spoiled, and the rubber door seals are a favorite place for mold.
• The tasting corner and its fabric sofa: Upholstery and rugs exposed to humidity collect mold and dust mites.
• Kitchen drains: Floodwater can push dirt back up through the drains, leaving sewer smells and germs around sinks and floor channels.

What Is at Stake for a Cooking School Owner

The health of students, instructors and assistants

Urban floodwater often mixes with wastewater from drains. It can carry bacteria associated with diarrheal illness, such as E. coli, and it brings a risk of leptospirosis, which spreads through water or soil contaminated with rat urine and can enter through cuts. In a kitchen full of knives and sharp tools, small cuts are common. Mold from the dry store triggers allergies, sneezing and congestion, and can make asthma worse. Anyone who feels unwell after contact with floodwater should see a doctor; this article is not medical advice.

Food safety

What students make in class is food they are going to eat. If ingredients or food-contact surfaces are still contaminated, the risk goes straight to the people at your stations, and a single incident could seriously damage the school's reputation.

Revenue and bookings

Small cooking schools depend on advance bookings. Every postponed class means refunds or rescheduling. Corporate groups planning team-building days may simply move to another venue, and tourists with a fixed itinerary cannot wait for you to reopen.

Online reviews

Cooking-class students love to take photos and post reviews on booking platforms and social media. A few words such as "the room smelled musty" or "the aprons were smelly" can pull down your rating and make people scroll past your listing.

Discard or Keep? Sort Everything Before You Restore

Before talking about disinfection, the most important step in a teaching kitchen is to sort its contents correctly. These are the general principles most kitchens follow:

• Throw away: Every ingredient and food item that touched floodwater, including flour, sugar and dry goods whose bags got wet or show mold spots. Food from fridges that lost power for a long time or where water reached the unit. Kitchen sponges, wooden chopping boards that soaked in water, and any tools with cracks that cannot be cleaned thoroughly.
• Wash, disinfect and keep: Pots, pans, metal baking trays, stainless steel bowls and smooth, uncracked utensils. Wash them with dishwashing liquid, then disinfect them using an appropriate method.
• Get advice first: Ovens, fridges and stand mixers where water reached the motor or control board should be checked by an electrician or the brand's service provider before you switch them on.
• Aprons and hand towels: Wash in hot water with detergent and dry them fully in the sun. Replace any fabric with deep-set mold stains.

Why washing alone is not enough

• Scrubbing floors with bleach and nothing else: It helps on visible surfaces but cannot reach under counters, behind cupboards or into the air of the dry store. A chlorine smell in a kitchen also interferes with tasting.
• Running fans or air-conditioning to dry the room: The surface dries, but mold spores may be blown around the room and the musty smell stays trapped in fabric and wood.
• Scented candles or boiling pandan leaves: They mask the smell temporarily without fixing the cause, and in a teaching kitchen they can interfere with the aromas students are supposed to be learning.
• Repainting the dry store: If the wall is still damp inside, mold spots will return within weeks.

The Solution: Chemgene HLD4H Disinfection Fogging and Ozone Treatment, Done in the Right Order

The disinfection service from World Health Disinfection (WHD) uses CHEMGENE HLD4H applied with ULV fogging equipment. Its fine droplets reach under counters, behind cupboards and into the corners of the dry store. The ozone treatment service uses ozone gas at a controlled concentration to tackle airborne mold spores and break down the odor molecules trapped in walls, shelving and the soft furniture in the tasting corner.

Our step-by-step process for cooking studios and baking schools

1. Site survey: The team inspects student stations, the dry store, fridges, the tasting corner, restrooms and drains, noting how high the water rose, where moisture remains and where odors persist.
2. Sorting and clearing advice: We help you decide which ingredients and tools to discard and which can be washed and kept, and we ask you to move all remaining ingredients, food containers, and silicone or rubber tools out of the area before work begins.
3. Kitchen safety preparation: Gas valves are closed and every hob is switched off. Ovens and appliances are turned off. Sensitive electronics such as digital scales, teaching tablets and the camera used to stream classes are covered or moved out.
4. Disinfection fogging with Chemgene HLD4H: We fog floors, lower walls, under counters, open drawers, the cleared dry store, drains, restrooms and the tasting corner.
5. Closed-room ozone treatment: Doors, windows and air-conditioning are closed, and the ozone generator runs for a set time, with special focus on the flour and dry goods store and the main teaching area.
6. Ventilation: Doors and windows are opened and fans are run until the ozone has broken down before anyone re-enters.
7. Preparing food-contact surfaces: After ventilation, counters, chopping boards and surfaces that touch food directly are rinsed with clean water according to the team's guidance before new ingredients come in.
8. Re-check and advice: We check odor and damp spots again and advise on storing new ingredients off the floor, using airtight containers and keeping humidity in the dry store under control.

Getting Ready for the First Class Back

• Restock in an organized way: Buy only what you need for the first few classes, store it in airtight containers on shelves well off the floor, and label each one with its opening date.
• Use fresh or freshly laundered aprons: The apron is the first thing a student touches. The way it smells tells them how clean the whole studio is.
• Let students know in advance: Send a short message explaining that the studio has been cleaned, disinfected and ozone-treated, ideally with before-and-after photos. It eases the worries of people who have already booked.
• Wipe shared touch points between classes: Keep a CHEMGENE HLD4H 750ml spray on hand for door handles, taps, switches and other surfaces that do not touch food.
• Watch the dry store during the first month: Check it every morning. If a musty smell or new mold spots appear, contact the team for a re-check.

It is worth thinking about the atmosphere on that first day as well. Open the windows for an hour before students arrive, have the ovens warming with something simple and fragrant such as a tray of butter cookies, and set each station with a neatly folded clean apron. These small touches tell returning students more clearly than any message that the kitchen is ready for them again.

A Practical Timeline for a Small Teaching Kitchen

Every studio is different, but many small cooking schools find it useful to think about recovery in stages rather than as one big job. A realistic sequence often looks like this:

1. Days one and two after the water recedes: Remove standing water and mud, photograph the damage for insurance or the landlord, and separate everything into "discard", "wash and keep" and "needs a technician".
2. Days three to five: Throw out spoiled ingredients and damaged tools, wash surviving cookware, launder fabrics, and arrange for appliances to be inspected. Open the dry store and let it air as much as possible.
3. Around the end of the first week: Book the survey, followed by disinfection fogging and ozone treatment once the room has been cleared and cleaned.
4. The day after treatment: Rinse food-contact surfaces, bring in fresh ingredients, set up the stations, and do a trial bake with your team before students return.
5. The first month back: Keep an eye on humidity in the dry store, check under counters weekly, and note any returning odors.

Working in stages like this keeps the job manageable for a small team and gives you clear dates to share with students who are waiting to rebook.

Reassuring Corporate Clients and International Guests

Team-building bookings and overseas visitors are often the most valuable customers for a small cooking school, and they are also the most cautious. A company organizer has to justify the venue to colleagues, and a traveler reading reviews from the other side of the world has no way to see your kitchen before arriving. A little preparation goes a long way with both groups.

• Prepare a short, honest summary: Two or three sentences explaining that the studio was affected by the flood, which materials and ingredients were replaced, and that the space was professionally disinfected and ozone-treated before reopening.
• Update your booking page: A brief note on your listing, together with a fresh photo of clean stations, answers questions before they are asked and shows that you are on top of the situation.
• Offer flexibility where you can: If a group would prefer to wait another week, letting them move their date without fuss often earns more loyalty than pushing them to keep the original booking.
• Brief your instructors and assistants: Everyone who greets students should be able to explain, calmly and in simple terms, what was done to restore the kitchen.

Handled well, a flood can even become part of your story: a studio that took food safety seriously when it would have been easier to cut corners. That is exactly the kind of detail that guests remember and mention when they leave a review.

10 Reasons Cooking Studios in Sathorn Choose Professional Recovery

1. ULV disinfection fogging reaches the gaps under counters and behind cupboards that a cloth cannot.
2. CHEMGENE HLD4H is a disinfectant used in medical settings and public spaces.
3. Ozone treatment tackles musty odors in windowless flour and dry goods stores.
4. It helps reduce airborne mold spores before new ingredients arrive.
5. Kitchen-specific safety steps are built in, from shutting off gas to removing all food.
6. You get clear guidance on what to throw out and what can be washed and kept.
7. The work can be scheduled to finish before classes that are already booked.
8. No more relying on scented candles or sprays that interfere with tasting.
9. It combines well with ozone treatment for odors and chemical residue if you repaint or repair after the flood.
10. The team serves Sathorn, Silom, Bang Rak, Yannawa and nearby areas.

Before and After Recovery

In the Words of a Studio Owner

"I honestly thought that mopping the floor and scrubbing the stations would be enough to reopen. The moment I opened the flour store, I knew it wasn't. We threw out every ingredient the water had touched, washed all the aprons, and had the team fog and ozone-treat the studio. The croissant class we postponed by a week filled up again, and several students told us they were glad we didn't rush it."

— Chef Prae (pseudonym), owner of a cooking studio in Sathorn

Note: The story and quote in this article are an illustrative scenario based on situations commonly encountered after floods. Actual results depend on the condition and extent of damage at each site.

Frequently Asked Questions

Q: Can we cook immediately after the kitchen is fogged?
A: Wait for the ventilation period the team recommends, then rinse surfaces that touch food directly with clean water before bringing in new ingredients.

Q: Can flour with mold spots be used after ozone treatment?
A: No. Any ingredient that touched floodwater or shows mold should be thrown away. Ozone treatment is for rooms and spaces; it is not a way to rescue contaminated food.

Q: Do the ovens and fridge need to be moved out?
A: They do not need to be moved, but they must be switched off, gas supplies closed and all food removed from the fridge. If water reached the unit, have a technician check it before use.

Q: What about silicone tools and rubber spatulas?
A: Move them out during ozone treatment, because some rubbers degrade with prolonged ozone exposure. Clean and disinfect them separately using a method suitable for the material.

Q: How long does the studio need to be closed?
A: For a small studio, fogging and ozone treatment can usually be completed within one day including ventilation. Sorting and repair time depends on the damage; the team will estimate after the survey.

Q: Do we need to empty the drawers under each station?
A: Yes. Take out all tools and leave the drawers and cupboard doors open so the fogging droplets and ozone can reach inside. Dry any standing water first, because liquid pooled in the corners will dilute the disinfectant and keep the wood or particleboard damp.

Q: Should the drains be treated as well?
A: Drains are one of the first places to check. Flush them with clean water, remove debris from floor channels and grease traps, and include them in the fogging plan. If a sewer smell keeps coming back after treatment, ask a plumber to inspect the traps and pipes for damage.

Q: The sofa in the tasting corner smells musty. What can we do?
A: Ozone treatment helps with odor, and you can combine it with our dust mite removal service for upholstery. If the sofa soaked in floodwater for a long time, consider replacing it.

Ready to Reopen Your Teaching Kitchen With Confidence

Serving Sathorn, Silom, Bang Rak, Yannawa, Bang Kho Laem and nearby areas of Bangkok.

View Disinfection Service – Click Here

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

Related Articles and Resources

• CHEMGENE HLD4H 750ml disinfectant spray
• Ozone treatment for odors and chemical residue
• Master Ozone Generator
• All articles
• External source: WHO: Floods and health and Department of Health, Thailand

#PostFloodDisinfection #KitchenDisinfection #OzoneTreatment #MoldRemoval #MustyOdorRemoval #DisinfectionService #Chemgene #BakingClass

Keywords: cooking school disinfection after flood, baking class flood recovery, cooking studio ozone treatment, kitchen mold removal, musty odor removal, disinfection service, Sathorn, Bangkok 2026