A Story from the Field: Fogged-Up Glass Cases in a Shop by the Chao Phraya

Uncle Somchai has run a small amulet and antiques shop near the market in Mueang Ang Thong for more than twenty years. Along one wall stand rows of glass cases holding Buddhist amulets. Opposite them are shelves of blue-and-white porcelain, brass oil lamps, old wall clocks, a heavy teak cabinet, boxes of collectible coins and banknotes, and a corner of vintage Thai film posters that younger visitors love to photograph. His customers range from veteran collectors to families looking for an amulet to keep at home and tourists who stop in on their way through Ang Thong.

When the Chao Phraya River overflowed in 2026, water came into the shop to roughly the height of a forearm. Uncle Somchai and his nephew rushed the amulets from the lower cases, the coin boxes and the smallest, most valuable pieces upstairs. But the big teak cabinet, the bases of the glass cases, crates of old amulet reference books and a pile of rolled posters under the table all sat in the water for several days.

When the water went down, what he saw made his heart sink. Several glass cases had a white haze on the inside of the glass. The rubber seals around the case doors had black spots of mold. The base of the teak cabinet had swollen and smelled strongly musty. The old reference books he had collected for years had fused into solid blocks. A long line of mud ran along the shop walls, and every time he opened the teak cabinet a wave of damp, stale air pushed him back a step. His nephew, who was helping with the clean-up, started coughing and getting an itchy nose on the second day.

"Some of these pieces you couldn't buy again with any amount of money," Uncle Somchai said. "But I'm afraid to spray anything on them. I'm afraid of damaging the amulets or changing the surface of the coins. I've heard ozone gets rid of smells, but I've also heard ozone makes metal tarnish. So what am I supposed to do?" It is a question the World Health Disinfection team hears often from amulet and antique dealers in Ang Thong, Pa Mok and Wiset Chai Chan after the water recedes, and it deserves a careful answer.

Why Antique and Collectibles Shops Need Extra Care

An amulet or antiques shop holds a remarkable mix of materials in a single room: bronze, brass, silver, fired clay, pressed powder, wood, paper, cloth, leather, rubber and glass. Each one reacts differently to moisture, to cleaning chemicals and to ozone. A method that is perfect for walls and floors may be completely wrong for some of the objects in the cases. That is why the order of work matters as much as the tools.

The Health Risk for Shop Owners

Floodwater that has passed through streets and drains carries bacteria such as E. coli, other germs that cause diarrhea, and the Leptospira bacteria that cause leptospirosis. These germs stay behind in the mud, under the cabinets and inside any absorbent material that was soaked. Wooden cabinets and paper that stay damp for days become sources of mold spores, which can trigger allergies, coughing, sneezing and asthma in sensitive people. Many antique dealers are older, so gloves, boots and a mask are essential during every stage of the clean-up. This is general information, not medical advice; anyone who develops a fever or an infected wound after contact with floodwater should see a doctor.

Damage to Valuable Pieces

Moisture trapped inside closed cases causes haze on glass, mold on paper and wood, stains on metal surfaces and a musty smell that settles into the objects themselves. Left alone, small problems grow into ones that are hard to reverse. Getting the room and the cases dry, clean and odor-free as quickly as possible is the best protection the collection can have.

The Trust of Serious Collectors

Collectors notice details. A musty smell in the shop or a mold mark on an amulet box can make a customer wonder how well everything else in the shop has been looked after. A shop that recovers in an organized way, and can explain to customers exactly what it did, keeps that trust far more easily.

Respect for Sacred Objects

Amulets and other sacred objects are revered by the people who keep them. Working in this kind of shop means working politely, never placing an amulet on the floor and moving things only in the way the owner asks. Our team leaves the handling of every sacred object to the shop owner personally.

Common Fixes That Can Hurt a Collection

• Spraying disinfectant or alcohol directly onto amulets and coins: This can change the surface of an amulet, remove the aged patina that collectors value, or alter the face of a coin. It also does nothing about the musty smell inside the case.
• Wiping antiques with bleach: Bleach corrodes metal, blotches wood and fabric, and its fumes make breathing uncomfortable in a small shop.
• Putting scented sachets or air freshener in the cases: The perfume mixes with the mustiness into an odd smell, and some fragrance compounds leave a film on glass and on the surface of objects.
• Shutting the cases tight to keep dust out: If a case is still damp inside, closing it simply traps the moisture and gives mold a perfect home.
• Running an ozone machine at full power overnight with everything still inside: High concentrations of ozone over a long period can degrade rubber, speed up tarnish on some metals and affect paper, leather and certain pigments. The dose has to be controlled and the valuables removed first.

The WHD Solution: Valuables Out First, Then Restore the Shop Step by Step

The principle World Health Disinfection (WHD) follows in amulet and antique shops is simple: we restore the room and the furniture, we do not experiment on the collection. After the valuables have been removed, we use our disinfection fogging service with CHEMGENE HLD4H through ULV equipment on floors, walls, ceilings, the space under cabinets and the structure of the shop. We then use our ozone treatment service, with the dose and duration controlled, to deal with airborne mold spores and the musty odor soaked into walls, empty wooden cabinets and the air of the room.

Valuable pieces, especially amulets, coins, banknotes, silverware, brass, old photographs, rare books and anything with rubber or leather parts, are moved by the owner to a dry, clean area, or stored in fully sealed containers during treatment. For items damaged directly by the water, such as books that have fused together or paintings with mold, we recommend consulting a specialist in the conservation of antiques or documents. They have tools and methods for drying and stabilizing fragile objects that no general cleaning service should pretend to offer.

How the Work Is Done

1. Joint site survey with the owner: We check how high the water reached, where mold is visible, which cases were affected and how the display lighting is wired, and we make a list together of everything that must be moved before work starts.
2. The owner removes the valuables: The owner personally moves amulets and sacred objects in the appropriate way. Our team helps lift heavy cabinets and furniture only where the owner permits.
3. Mud removal and drying advice: Wash out the mud, open every case so air can pass through, remove glass shelves for cleaning, and throw away soaked materials such as case linings and foam inserts.
4. ULV disinfection fogging: CHEMGENE HLD4H is fogged across floors, walls, the space under cabinets, the inside of empty cases and the bathroom, and given the proper contact time.
5. Controlled ozone shock: The shop is closed, and electronics, LED case lighting and sensitive CCTV equipment are covered or removed. The ozone dose is set for the size of the room.
6. Ventilation: Doors and windows are opened until the ozone has fully broken down before anyone goes back in.
7. Re-check and returning the collection: We check odor and humidity inside the cases. Once the cases are properly dry, the owner returns the collection, with moisture-absorbing packets placed inside closed cases.

Caring for Each Type of Item After the Water Recedes

Amulets and coins: Do not spray anything directly onto them. If they were in the floodwater, talk to someone experienced in amulet care before washing or wiping them. In the meantime, keep them somewhere dry and airy, separated from anything with mold on it.

Amulet cases and plastic frames: Open any case that let water in and let it dry. If the waterproof rubber seal inside has deteriorated, replace it, because old rubber holds both moisture and odor.

Teak cabinets and old wooden furniture: Old timber absorbs water deeply and needs to dry slowly. Putting it straight into strong sun can make it crack. Wipe surface mold away and include the empty cabinets in the fogging and ozone treatment.

Books, posters and old photographs: Never try to peel apart pages or prints that have stuck together while they are still wet. Consult a document conservation specialist. Paper that stayed dry but smells musty can be boxed separately and kept in a clean, dry room.

Porcelain and glassware: Wash with clean water and a mild detergent, then dry thoroughly. Pieces with old repairs or overglaze painted decoration should be checked by a specialist first, because water and scrubbing can loosen old repairs.

Back storerooms and living quarters: If the shop is also the family home, see our page on residential ozone disinfection. If cleaning products have left a chemical smell behind, see ozone treatment for odors and chemical residue.

A Simple Checklist for the First Week

When a shop full of irreplaceable things floods, it is easy to freeze or to rush. A calm first week usually looks like this. On day one, photograph everything for your own records and for any insurance claim, put on gloves and a mask, and move the most valuable small items to a dry room. On day two, have an electrician check the wiring and the case lighting before anything is switched on. On days two and three, remove the mud, open every case and drawer, and take out soaked linings, foam and cardboard. From day three onward, let the cabinets dry slowly with good airflow but without harsh direct sun. Once the heavy cleaning is finished and the valuables are safely out of the room, book disinfection fogging and controlled ozone treatment. After ventilation, check the cases for dampness, add moisture absorbers, and only then begin returning the collection, starting with the least sensitive items. Keep a notebook of what went where so nothing goes missing in the confusion.

Why Fogging and Ozone Work Better Together

Owners sometimes ask why we use two different treatments instead of just one. The answer is that they solve different parts of the problem. Disinfection fogging works on surfaces. The fine ULV mist settles on floors, walls, the undersides of shelves and the inside of empty cabinets, where floodwater left bacteria behind in a thin film of silt that is easy to miss when you wipe by hand. Ozone works on the air and on odor. It is a gas, so it spreads into every gap in a sealed room, including the joints of old furniture and the cavities behind wall panels, and it breaks down the molecules that cause the musty smell rather than covering them up. Fogging without ozone can leave a room that is clean but still smells of the flood. Ozone without fogging can leave a room that smells fresher but still has contaminated surfaces. Used in the right order, after cleaning and after the valuables are out, the two together give the shop the best chance of a genuine fresh start.

Shops Along the River in Ang Thong: Planning for Next Time

Many of the older shophouses in Mueang Ang Thong sit close to the Chao Phraya, and the owners know that high water may return in a future rainy season. A few simple changes made now can make the next flood far less painful. Raise the lowest display cases onto sturdy legs or a plinth so their bases sit above the usual flood line. Keep the most valuable small pieces in lidded, waterproof boxes that can be carried upstairs in minutes. Store reference books and paper archives on upper shelves or on the upper floor rather than in crates under the counter. Keep a printed list of your most important items, with photographs, in a safe place outside the shop. And keep the contact details of an electrician, a conservation specialist and a disinfection service somewhere you can find them quickly. Recovery is always faster when the plan is written down before the water arrives.

10 Reasons Amulet and Antique Shops Trust WHD

1. We restore the room and the furniture and never experiment with chemicals or ozone on a customer's collection.
2. The owner handles amulets and sacred objects personally, with the respect they deserve.
3. We use CHEMGENE HLD4H on the space and structure only after the valuables are out.
4. Our ozone treatment uses a controlled dose and duration matched to the shop size.
5. We give clear advice on which items must be removed, including silver, brass, rubber, leather and old photographs.
6. ULV fogging reaches under cabinets, behind shelves and into corners that cannot be wiped.
7. Case lighting, CCTV and electronics are covered or moved before we begin.
8. No fragrance is used to mask odors, so no film or strange smell is left in the cases.
9. The CHEMGENE 750 ml spray is available for counters, cabinet handles and other points customers touch often.
10. The Master Ozone Generator is available for shops that want to look after a storeroom long term, with guidance on safe use.

In the Owner's Words

"What impressed me was that the team never touched our amulets. They let us put everything away ourselves first, and then they worked on the room and the cabinets. They also explained exactly which things could not stay in the room during the ozone treatment. When we opened again, the regulars walked in and nobody said a word about the smell."
— An amulet and antiques dealer in Mueang Ang Thong (a story from the field)

Frequently Asked Questions

Q: Can you ozone the shop with the amulets still in the cases?
A: We recommend that the owner removes amulets, coins and valuables, or stores them in fully sealed containers, before treatment, so that metal surfaces and sensitive materials are not affected by ozone.

Q: Will the CHEMGENE disinfectant touch my collectibles?
A: We fog the space, walls, floors and empty cabinets after the items are removed. We do not spray collectibles directly.

Q: Will ozone restore old books that got wet?
A: No. Ozone does not repair wet or stuck paper. Please consult a document conservation specialist. Ozone helps reduce musty odor and spores in the room where items are stored.

Q: How many days will the shop be closed?
A: Fogging, ozone and ventilation are usually completed in one day, but old wooden cabinets may need several more days before they are dry enough to hold the collection again.

Q: How do I stop mold returning in my display cases?
A: Put moisture absorbers in closed cases and replace them when saturated, open the cases for airflow regularly, keep cabinets away from walls that are still damp, and check the rubber seals during the rainy season.

Q: My brass lamps already look darker after the flood. Is that mold?
A: Not necessarily. Brass and bronze naturally darken when they are exposed to moisture and dirty water, and that change is different from mold growth. Wipe off any mud gently with clean water, dry the piece completely and ask a metal-care or antiques specialist before using any polish, because some collectors prefer the aged surface to be kept. In any case, keep these pieces out of the room during ozone treatment so the darkening does not speed up.

Q: Can the shop stay partly open while you work?
A: Not during fogging or ozone treatment. The shop must be empty of people for those stages and until ventilation is complete. Many owners schedule the work for a day the shop is normally closed.

Q: Do you serve other districts in Ang Thong?
A: Please ask by phone or LINE. Our team will confirm details once we know the location and the size of the space.

Protect Your Collection, Starting with a Clean, Dry Room

Talk to the WHD team about restoring amulet shops, antique stores and collectibles rooms in Mueang Ang Thong and nearby areas.

Book Ozone Treatment Here

See Our Disinfection Service

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

Related Links

• Residential ozone disinfection
• Ozone treatment for odors and chemical residue
• CHEMGENE HLD4H disinfectant
• All articles
• External sources: WHO: Floods and Department of Health, Thailand