A Story From the Field: Clean Clothes That Smell Like a Forgotten Load

Khun Bua is in her fifties and lives in a two-storey townhouse off Ekkachai Road in Chom Thong, on the Thonburi side of Bangkok, with her husband and two grandchildren. At the back of the house is a small laundry room that the family added years ago. It holds a front-loading washing machine, a utility sink, a laundry basket and a shelf of detergents. With two school-age grandchildren, she runs at least one load of school uniforms every single day.

During the 2026 floods, water came into the house to a depth of about forty centimetres and stayed for several days. The laundry room, whose floor sits slightly lower than the rest of the house, was hit hardest. The base of the washing machine was under water, the laundry basket floated, and dirty water pushed back up through the floor drain as well.

When the water went down, Khun Bua's first instinct was to plug the machine straight back in. There was a mountain of mud-stained clothing waiting. Luckily, a neighbour warned her not to, so she called a technician to check the electrics first. Once the technician confirmed the machine was safe to use, she started washing again. But the clothes came out smelling like a load that had been left in the drum overnight. There were black spots along the rubber door seal, the detergent drawer was coated in slippery slime, and the whole laundry room smelled of drains mixed with damp. Her youngest grandchild started complaining that his school uniform felt itchy.

This guide explains why a washing machine that a technician has passed as safe can still make clothes smell, and what to deal with, in the right order, across the machine itself, the drain and the laundry room, so that your washing comes out clean and fresh again.

First Things First: Electrical Safety

• Do not plug in or switch on any appliance that has been in floodwater until a qualified electrician or appliance technician has checked it. Water and mud trapped in the motor, the control board and the wiring can cause a short circuit or an electric shock.
• Ask the electrician to check the sockets, wiring and residual current device in the laundry room as well. It is a room that gets wet even in normal times.
• Any water heater or tumble dryer in the same room should be checked too.
• If the technician recommends replacing the machine, follow that advice. Whether a flooded appliance can be repaired or used again is a decision for the technician and the manufacturer.

WHD does not repair appliances or inspect electrical systems. That work needs specialist knowledge. The rest of this guide starts from the point where a technician has confirmed the machine can be used safely.

Why a Working Machine Can Still Make Clothes Smell

1. Floodwater reached the parts you cannot see. Muddy, contaminated floodwater can get into the outer tub, the drain hose, the lint or debris filter and the space beneath the drum. That residue does not disappear simply because the drum can spin again.

2. The door seal is a natural trap. A front-loader has a folded rubber gasket around the door. Water, lint and detergent residue collect in its folds. Add the extra humidity after a flood, and black mold can spread along those folds very quickly.

3. The detergent and softener drawer. This drawer holds sticky residue from detergent and fabric softener and rarely gets cleaned. In humid conditions it grows slime and mold that release odour into the wash water every cycle.

4. The filter and drain hose. If mud or debris is blocking the filter or drain hose, the machine cannot empty completely. Water that sits in the machine becomes a breeding ground for germs and smells.

5. The laundry room itself is damp. Walls and floors that were under water are still releasing moisture. The basket and shelves that were submerged carry residue. Clothes hung or left waiting in this room simply absorb the smell all over again.

6. A floor drain that lets sewer smells back in. During the flood, pressure in the drains can push out the water that normally sits in the trap, or mud can block it. Sewer smells then rise into the room all day. If the drain smells strongly or drains slowly, ask a plumber to check it.

Many homes in Chom Thong are townhouses and shophouses with a kitchen or laundry room added at the back. These extensions often sit lower than the main house and close to the drains, so they are the first rooms to flood and the last to dry out.

More Than Just a Bad Smell

Health. Floodwater can be contaminated with germs from drains and sewers, such as E. coli, and where water has stood for days there is a risk of leptospirosis. Clothes washed in a machine that is still dirty can irritate the skin and cause itchy rashes, especially for children and people with sensitive skin. Mold spores in the laundry room can also trigger allergies and asthma.

Clothes and linen. Once a musty smell is in fabric, it is hard to wash out. Washing again in a dirty machine only drives the smell deeper. Some families end up throwing away towels and several sets of school uniforms.

Money. You use more detergent, more softener, more water and more electricity because every load needs washing twice. Some families buy a new machine when the real problem is cleaning and the condition of the room.

Time. A job that used to take an hour turns into a whole day, at a time when the rest of the house still needs recovering too.

Cleaning the Machine After the Technician's Check: Follow the Manufacturer's Manual

Once a technician has confirmed the machine is safe, cleaning it is something most householders can do themselves. Always follow the manufacturer's manual first. The general approach looks like this:

1. Wear rubber gloves, because residue in the machine may come from contaminated floodwater.
2. Remove and clean the debris filter as described in the manual, clearing out all mud and debris.
3. Pull out the detergent drawer and wash it with warm water and a soft brush, along with the slot it sits in.
4. Wipe every fold of the door gasket with a cloth dipped in soapy water, then dry it.
5. Run the drum clean programme, or an empty hot wash, as recommended by the manufacturer. Use a drum cleaner that is stated to be suitable for that model, and repeat if a smell remains.
6. When you have finished, leave the door and detergent drawer open so the inside can dry.

Take care: never mix bleach with other cleaning products, because this can release dangerous fumes. If the gasket is torn, hardened, or stained so deeply that it will not wipe clean, ask the technician about replacing it.

Questions Worth Asking the Technician

When the electrician or appliance technician visits, a few simple questions will help you plan the rest of the clean-up and avoid paying twice:

• Did water reach the motor, the control board or the wiring, and is anything showing signs of corrosion?
• Is the drain pump working properly, and is the drain hose clear of mud along its whole length?
• Is the door seal still flexible and intact, or should it be replaced while you are there?
• Are the sockets and the residual current device in the laundry room safe to use, given that the room was under water?
• Which drum cleaning programme and which cleaning products does the manufacturer allow for this particular model?

Write the answers down. They tell you exactly what you can clean yourself, what needs a part replaced, and when the room is ready for disinfection fogging and ozone treatment.

What to Do With Clothes and Linen That Went Through the Flood

Most families have a pile of clothing, towels and bedding that was soaked or splashed by floodwater. Sorting this pile carefully saves money and protects your health.

Sort with gloves on. Treat everything that touched floodwater as contaminated until it has been washed. Wear rubber gloves, keep the pile outside the house or in a covered area, and wash your hands well afterwards.

Rinse off mud first. Shake off dried mud outdoors and rinse heavily soiled items in a bucket before they go anywhere near the washing machine, so you do not send fresh mud straight back into the filter and drain.

Wash at the highest temperature the label allows. Use the normal amount of detergent, and wash smaller loads so water and detergent can move freely through the fabric.

Dry completely, ideally in the sun. Clothes that are put away even slightly damp will smell musty again within days. Do not dry laundry inside the laundry room until the room itself has been treated and is dry.

Know when to let go. Items with deep mold staining, items that still smell after two or three washes, and soft toys or pillows that cannot be washed properly are usually better thrown away, especially if they are used by babies and young children.

A Simple First-Week Plan

1. Day 1: Keep the machine unplugged. Clear mud from the room, take out wet baskets and shelving, and book the electrician or appliance technician.
2. Day 2 to 3: Technician visit. If the machine is passed as safe, clean the filter, drawer and door seal, and run a drum clean programme.
3. Day 3 to 4: Ask a plumber to look at the floor drain if the smell is strong or water drains slowly. Open the room up to dry on fine days.
4. Day 4 to 5: Disinfection fogging and ozone treatment of the laundry room by the WHD team, followed by ventilation.
5. Day 6 to 7: Start washing normally again, with smaller loads, and dry everything completely before putting it away.

Every home is different, so the timing may shift, but keeping to this order means each step builds on the one before rather than undoing it.

Why the Usual Fixes Do Not Finish the Job

Adding more fabric softener. The fragrance hides the musty smell for a while, but the extra residue builds up in the drawer and the outer tub and becomes food for mold in the next cycle.

Cleaning the machine but ignoring the room. The machine may be clean, but clothes hung or left in a damp, musty laundry room soak the smell straight back up.

Closing the door after every wash. Moisture trapped in the drum and the gasket has nowhere to go, and mold returns within days.

Pouring bleach down the drain. It may reduce the smell briefly, but it does not clear a blocked pipe or refill an empty trap, and chlorine fumes in a closed room are not good for your lungs.

Scented candles and air fresheners. They mask the smell, but the spores and germs on surfaces are all still there.

How the WHD Team Works in a Laundry Room

1. Survey. Our team looks at the walls, floor, floor drain, shelving and laundry baskets. We ask whether the electrics and appliances have already been checked by a technician. If not, we recommend that this is done first.

2. Preparing the room. We advise you to take out clothes, detergents and personal items, clean off any visible mud, and close the washing machine door or lid during treatment so that its rubber parts are not directly exposed to ozone.

3. Disinfection fogging. We use CHEMGENE HLD4H disinfectant applied with ULV fogging equipment across the walls, floor, corners, shelving, the outside surfaces of the appliances and the area around the floor drain.

4. Ozone treatment. We use an ozone generator at a controlled dose matched to the size of the room. The room stays closed for the set time so ozone can deal with mold spores and break down odour molecules that have soaked into the room.

5. Ventilation. We open doors and windows to air the room and tell you clearly when you can go back in.

6. Follow-up. We explain how to look after the room and the machine from here on, and arrange a recheck if the smell comes back.

Important: WHD provides disinfection fogging and ozone treatment only. We do not repair washing machines, inspect electrical systems or fix plumbing. Those jobs should be done by electricians, appliance technicians and plumbers.

Ozone Safety

• No people, pets or plants may remain in the room while ozone treatment is running.
• After treatment, the room must be ventilated thoroughly before anyone goes back in. The team will tell you the timing.
• Rubber door seals, hoses and other rubber parts of appliances can deteriorate with long exposure to high ozone levels, so the team uses a controlled dose and recommends closing the appliance door or covering it.
• Appliances that have not been checked by a technician should not be left plugged in during the work.

Read more on our page about ozone treatment for odours and chemical residue.

10 Reasons to Sort Out the Laundry Room in One Go After a Flood

1. Freshly washed clothes stop absorbing a musty smell from the room.
2. A professional disinfection service reaches corners, the space under shelves and the area around the drain.
3. Ozone treatment helps break down odours that have soaked into walls and floors.
4. Fewer mold spores in a room that children and older relatives walk through every day.
5. Fewer repeat washes, saving detergent, water and electricity.
6. School uniforms and towels come out clean and fresh again.
7. Treatment uses CHEMGENE HLD4H, a disinfectant designed for professional use.
8. No need to buy a new machine unnecessarily if the technician says the old one is fine.
9. The laundry room becomes a space you are comfortable using again.
10. You get a clear order of work and a clear re-entry time from the team.

What Our Customer Said

"I almost bought a new washing machine because I thought it was broken. The technician said the machine was fine and just needed cleaning right through to the filter and the door seal. Then the WHD team came to fog and ozone the laundry room. The drain smell and the damp smell are mostly gone. My grandchildren's uniforms smell fresh again and I don't have to wash everything twice anymore."

— Khun Bua, townhouse off Ekkachai Road, Chom Thong (a story from the field)

Keeping the Machine and Laundry Room From Smelling Again

• Leave the machine door open and the detergent drawer slightly pulled out after every wash so the inside can dry.
• Wipe the folds of the door seal dry once a week.
• Use detergent and softener in the amounts stated on the pack, not more.
• Clean the debris filter and run the drum clean programme as often as the manufacturer recommends.
• Pour water into the floor drain regularly so the trap always holds water.
• Never leave wet laundry sitting in the machine or the basket overnight.
• Wipe small mold spots on walls or shelves with CHEMGENE HLD4H spray as soon as you see them.

Frequently Asked Questions

Q: My washing machine was flooded. Can I just plug it in and see if it works?
A: No. Always have an electrician or appliance technician check it first. Trapped water and mud can cause a short circuit or an electric shock.

Q: The technician says the machine is fine, but my clothes still smell. Why?
A: Mud and mold may still be sitting in the filter, the detergent drawer, the door seal and the outer tub, and the laundry room itself may still be damp. You need to deal with both the machine and the room.

Q: Can you ozone-treat the inside of the washing machine?
A: The team treats the laundry room, not the inside of the machine, and will recommend closing or covering the machine door, because rubber parts should not be exposed to high ozone levels for long. Cleaning the drum should follow the manufacturer's manual.

Q: Do I have to throw away clothes that were in the flood?
A: Washable items can usually be washed in hot water, as allowed by the care label, and dried completely in the sun. Items with deep mold stains, tears, or a smell that will not wash out after several washes should be considered for disposal, especially items used by young children.

Q: Do we need to leave the house during ozone treatment?
A: You need to leave the treatment area, and the openings to the rest of the house should be closed. No people, pets or plants can be inside. The team will tell you when it is safe to go back in.

Q: Does WHD repair washing machines or drains?
A: No. WHD provides disinfection fogging and ozone treatment only. Electrical work, appliance repair and plumbing should be done by specialist tradespeople.

A Clean Laundry Room and Fresh Clothes Again in Chom Thong

Talk to the World Health Disinfection team about post-flood disinfection fogging and ozone treatment, any day of the week.

Book Ozone Treatment, Click Here

See Disinfection Service, Click Here

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

Related Links

• Residential ozone disinfection
• Ozone treatment for odours and chemical residue
• Master Ozone Generator
• All articles
• External sources: WHO: Floods and health and Department of Disease Control, Thailand