Dry cleaning kills adult moths on contact, but not their eggs or larvae hiding inside fabric
Dry cleaning will eliminate adult moths that are visible on or in your clothes, because the solvent and heat used in the process are lethal to living insects. However, dry cleaning alone is not a complete moth treatment. Moth eggs and larvae can survive the dry cleaning process if they are deeply embedded in the fabric or tucked into seams and hems where the solvent does not reach them thoroughly. If you have an active moth infestation in your closet or storage, sending clothes to the dry cleaner addresses only part of the problem.
The real risk is that you may return clean clothes to an infested space, where new moths will lay eggs on them again within days or weeks. For this reason, dry cleaning works best as one step in a larger plan that also includes treating your closet, storage areas, and the rest of your wardrobe.
Key Takeaways
- Dry cleaning solvents and heat kill adult moths but may not reach eggs and larvae buried deep in fabric fibers or seams.
- Returning dry-cleaned clothes to an untreated closet or storage space means moths can infest them again when ready.
- Freezing clothes at 0°F for at least two weeks kills all moth life stages, including eggs, and works alongside or instead of dry cleaning.
- Washing clothes in hot water (at least 120°F) for 20 to 30 minutes kills moths at all life stages if the fabric can tolerate heat.
- Treating your closet, drawers, and storage areas with targeted insecticide or cedar is necessary to stop new moths from laying eggs on clean clothes.
How dry cleaning affects different moth life stages
Dry cleaning uses chemical solvents—usually perchloroethylene (perc) or hydrocarbon-based solvents—combined with agitation and heat to remove dirt and stains. Adult moths cannot survive this process. The solvent dissolves their protective outer layer, and the heat damages their internal systems. If you can see moths on your clothes, dry cleaning will kill them.
Moth eggs and larvae are a different story. Eggs are tiny (about the size of a pinhead) and sticky, so they cling to fabric fibers. Larvae burrow into the weave of wool, cashmere, silk, and other natural fibers to feed. If eggs or larvae are buried deep enough in the fabric or tucked into a seam, the dry cleaning solvent may not reach them. Some will survive and hatch or continue growing after your clothes come back from the cleaner.
The dry cleaning process is not designed to kill insects—it is designed to clean fabric. A professional dry cleaner will not intentionally treat your clothes with insecticide unless you specifically request it, and many cleaners do not offer this service.
When to use freezing instead of or alongside dry cleaning
Freezing is one of the most reliable ways to kill all moth life stages—eggs, larvae, and adults—without using chemicals or heat that might damage delicate fabrics. If you place clothes in a freezer set to 0°F or below for at least two weeks, every moth and egg in those clothes will die. This works even for fabrics that cannot tolerate hot water or dry cleaning solvents.
Freezing is practical for smaller items or a single infested garment. For a large wardrobe, you would need access to a large freezer or a commercial cold storage unit. Some pest control companies offer freezing services, though this is less common than chemical treatment. If you choose to freeze clothes at home, seal them in plastic bags first to prevent moisture from condensing on the fabric when you remove them from the freezer.
You can combine freezing and dry cleaning: freeze clothes first to kill all moth life stages, then dry clean them to remove any dead insects and debris. This two-step approach gives you the most certainty that your clothes are moth-free before you return them to storage.
Hot water washing as an alternative to dry cleaning
If your clothes can tolerate it, washing in hot water is another way to kill moths at all life stages. Water heated to at least 120°F for 20 to 30 minutes will kill eggs, larvae, and adults. Check the garment label first—many delicate fabrics like silk, wool, and cashmere are damaged by hot water, so this method works best for cotton, linen, and synthetic blends that are labeled as machine-washable.
Hot water washing is cheaper than dry cleaning and freezing, and it removes dead insects and moth debris from the fabric. The downside is that it can shrink, fade, or damage some fabrics. If you are unsure whether a garment can handle hot water, test it on a hidden area first or choose freezing or dry cleaning instead.
Treating your closet and storage space to prevent reinfestation
Cleaning your clothes is only half the solution. If you do not treat the space where you store them, moths will lay eggs on your clean clothes again. Adult moths live in dark, undisturbed areas like the back of closets, under furniture, and inside storage boxes. They lay eggs on fabric, and those eggs hatch into larvae that feed on your clothes.
To break the moth cycle, vacuum your closet thoroughly, including corners, baseboards, and under shelves. Wash or wipe down all surfaces with a damp cloth. Remove any lint, dust, or debris where moth larvae hide. Then choose one or more of these treatments:
- Cedar blocks or cedar-lined storage: Cedar oil repels moths but does not kill them. It works best as a preventive for clothes you have already cleaned, not as a treatment for an active infestation. Cedar loses its scent over time and needs to be replaced every 6 to 12 months.
- Mothballs or moth flakes: These contain naphthalene or paradichlorobenzene and kill moths and larvae on contact. They work in sealed containers or closets, but the smell is strong and lingers on clothes. Use them only in well-ventilated spaces and keep them away from children and pets.
- Targeted insecticide spray: Products labeled for moth control can be sprayed on closet shelves, under furniture, and along baseboards. Follow the label instructions carefully and allow the spray to dry before returning clothes to the closet. Some products are safe for use around food storage; others are not.
- Professional pest control: If the infestation is severe or widespread, a pest control company can treat your home with insecticide and monitor for new moths. This is more expensive than DIY methods but guarantees more thorough coverage.
Storing clothes safely after treatment
Once you have cleaned your clothes and treated your closet, store them in a way that prevents new moths from reaching them. Sealed plastic bins with tight-fitting lids are more effective than open shelves or cardboard boxes. Airtight containers also protect clothes from dust and humidity. If you use cedar blocks or mothballs, place them inside the container with your clothes so the scent or fumes surround the fabric.
Keep your closet and storage areas clean and dry. Moths are attracted to moisture and darkness, so good air circulation and occasional light help discourage them. Check stored clothes every few months for signs of new moths or damage. If you see small holes or webbing, you have a new infestation and will need to repeat the cleaning and treatment process.
When to call a professional pest control service
If you have tried dry cleaning, freezing, or washing and still see moths or damage to your clothes weeks later, the infestation may be larger than you can handle alone. Moth larvae can hide in places you cannot easily reach—inside walls, under baseboards, in air vents, or in furniture. A professional pest control company has tools and knowledge to find and treat these hidden areas.
Professional treatment usually involves a combination of insecticide spray, targeted applications in cracks and crevices, and sometimes heat treatment of an entire room. The cost varies depending on the size of your home and the severity of the infestation, but it is worth considering if moths return repeatedly despite your efforts. A pest control company can also identify what type of moth you have and whether the infestation is coming from outside or from stored food or materials in your home.
Frequently Asked Questions
Can I dry clean clothes while they still have moths on them?
Yes, dry cleaning will kill the adult moths. However, tell the dry cleaner about the infestation so they can inspect the clothes carefully and may support they are treated properly. Some cleaners may ask you to freeze or wash the clothes first to reduce the risk of spreading moths to other customers' garments.
Will one dry cleaning visit get rid of all the moths in my closet?
No. Dry cleaning treats only the clothes you send, not the moths living in your closet, drawers, or storage areas. You must also vacuum and treat the space itself, or new moths will lay eggs on your clean clothes within days.
Is it safe to use mothballs in a closet with clothes I wear regularly?
Mothballs work best in sealed containers or closets that are not opened often. If you open your closet daily, the fumes escape and the mothballs lose effectiveness. The smell also clings to clothes and can be difficult to remove. Cedar blocks are a less toxic alternative, though they are less effective against active infestations.
How long does it take to get rid of a moth infestation?
If you clean all your clothes and treat your closet thoroughly, you should see a significant reduction in moths within two to four weeks. However, if eggs or larvae survive in hidden areas, new moths may appear later. Monitor your closet for at least two months before you consider the infestation resolved.
Can I prevent moths by storing clothes in plastic bags?
Plastic bags slow moths down but do not stop them completely. Moth larvae can chew through thin plastic, and eggs can still hatch inside a bag if the plastic is not completely sealed. Airtight plastic bins with tight-fitting lids are much more effective than bags.