Dry cleaning does not reliably kill mold, and heat alone won't stop it from returning
Dry cleaning uses solvent and heat to remove stains and odors, but mold is a living organism that needs specific conditions to die. The solvents used in commercial dry cleaning—typically perchloroethylene (perc) or hydrocarbon—can kill some surface mold spores, but they don't address the root problem: moisture and the conditions that let mold grow back. If your clothes smell musty or show visible mold spots, dry cleaning will make them smell better temporarily, but the mold will return if you store them in a damp environment.
The heat used in dry cleaning (usually around 140°F to 160°F) is not hot enough to kill all mold spores. Mold spores can survive temperatures well below boiling and will germinate again once the fabric cools and moisture returns. This is why clothes that come back from the dry cleaner smelling fresh can develop mold smell again within weeks if stored in a basement, closet, or other damp space.
Key Takeaways
- Dry cleaning solvents and heat can remove surface mold and odor, but do not kill mold at the root or prevent regrowth.
- Mold will return to clean clothes if they are stored in humidity above 50 percent or in poorly ventilated spaces.
- Before dry cleaning moldy clothes, brush off visible mold outdoors to avoid spreading spores inside your home.
- The real solution is controlling moisture in your storage space—using a dehumidifier, improving air flow, or moving clothes to a drier location.
Why mold comes back after dry cleaning
Mold grows because of three things: moisture, darkness, and a food source (fabric fibers are food for mold). Dry cleaning removes the mold that is already there, but it does not change the environment that caused it to grow. If you store your cleaned clothes in a humid closet, basement, or attic, mold spores in the air will land on the fabric and start growing again within days or weeks.
The dry cleaning process also does not penetrate deep into the fabric weave the way washing does. Mold can live inside fibers as well as on the surface. The solvent may kill surface spores, but spores embedded deeper in the weave can survive and resume growth once the fabric is back in a moist environment.
How to prepare moldy clothes before taking them to the dry cleaner
If your clothes have visible mold or a strong musty smell, take them outside before doing anything else. Brush off any visible mold with a stiff brush or old toothbrush while standing outside or in a garage with the door open. This removes loose spores and prevents you from spreading them through your home when you handle the clothes.
Place the clothes in a sealed plastic bag when ready after brushing. Do not leave them sitting in a damp area. When you take them to the dry cleaner, tell the staff that the clothes have had mold. Some dry cleaners have special protocols for moldy items and may charge extra or ask you to wait while they process them separately to avoid contaminating other customers' clothes.
Do not wash moldy clothes at home in a regular washing machine. The moisture and enclosed space of the machine can spread spores, and the water may not get hot enough to kill them all. Dry cleaning is a better choice than home washing for this reason.
What to do after dry cleaning to prevent mold from returning
The moment your clothes come home from the dry cleaner, remove them from the plastic bag. Plastic traps moisture and can cause mold to regrow even on clean clothes. Hang them in a well-ventilated closet or lay them flat in a drawer that gets air circulation.
Check the humidity level in your storage space. Mold thrives above 50 percent humidity. If your closet, bedroom, or storage area feels damp or smells musty, use a portable dehumidifier to bring the humidity down. You can buy an inexpensive humidity meter (sometimes called a hygrometer) at a hardware store for under $15 to measure the moisture level in the room.
Improve air flow by leaving closet doors cracked open, using a small fan to circulate air, or installing a closet rod with space between hangers so air can move around the clothes. Do not store clothes in plastic bins or sealed containers in damp basements or attics. Use breathable storage bags or open shelving instead.
When to throw clothes away instead of dry cleaning them
If mold has been growing on clothes for weeks or months, dry cleaning may not be worth the cost. Mold can permanently stain fabric and weaken fibers, especially on delicate materials like silk or wool. If the mold has left dark or discolored patches that do not brush off, the damage is likely permanent.
Clothes that smell strongly of mold even after brushing may have mold deep in the fibers. Dry cleaning can reduce the smell, but it may not disappear completely. If the item is inexpensive or you have worn it rarely, replacing it is often simpler than paying for dry cleaning that may not fully solve the problem.
The real fix: controlling moisture in your home
Dry cleaning is a treatment, not a solution. The real fix is keeping your storage spaces dry. If you live in a humid climate or have a damp basement, attic, or closet, mold will keep coming back to your clothes no matter how often you dry clean them.
Start by finding the source of the moisture. Is water leaking into the basement? Is the bathroom fan not vented outside? Is the attic poorly insulated? Is the crawl space under your house wet? Fixing the moisture problem at the source—sealing leaks, improving ventilation, or installing a sump pump—is the only way to stop mold from returning.
If you cannot fix the moisture problem, move your clothes to a drier part of your home. Store seasonal clothes in a bedroom closet instead of a basement closet. Use a dehumidifier year-round in damp spaces. These steps cost far less than repeatedly dry cleaning moldy clothes.
Frequently Asked Questions
Can I wash moldy clothes at home instead of dry cleaning them?
You can wash them in hot water if the fabric allows it, but dry cleaning is safer because the solvent and heat are more effective at killing mold spores than home washing. Hot water washing works for cotton and sturdy fabrics, but delicate items like wool or silk should go to the dry cleaner. Always wash moldy clothes separately from other items.
Will vinegar or bleach kill mold on clothes before I dry clean them?
Bleach will kill mold on white cotton fabrics, but it will damage or discolor most other materials. Vinegar has limited mold-killing power and the smell can linger. Brushing off visible mold outdoors and then dry cleaning is the safest approach for most fabrics. If you use bleach, test it on a hidden seam first and only use it on white, sturdy fabrics.
How long does it take for mold to come back after dry cleaning?
It depends on how damp your storage space is. In a humid basement or closet, mold can start growing again within one to three weeks. In a dry, well-ventilated closet, clothes may stay mold-free for months or years. The key is keeping humidity below 50 percent and ensuring air can circulate around your clothes.
Should I store clothes in plastic bags or containers after dry cleaning?
No. Plastic traps moisture and can cause mold to regrow even on clean clothes. Store clothes on hangers in a ventilated closet or in breathable fabric storage bags. If you must use plastic temporarily while moving clothes, remove them as soon as you arrive at your destination.