Clothes moths typically enter your home by hitchhiking on secondhand clothing, vintage furniture, wool rugs, and other animal-fiber items you bring inside. They don’t fly in through open windows the way pantry moths or other household insects do. In most cases, an infestation traces back to a specific item that already carried eggs or larvae when it crossed your threshold.
How They Get Into Your Home
The most common entry point is something you carried through the front door yourself. Thrift store wool sweaters, antique rugs, inherited fur coats, secondhand upholstered furniture, and even taxidermy can harbor clothes moth eggs or larvae that are nearly invisible to the naked eye. A single female lays 40 to 50 eggs at a time, and those eggs are tiny enough to hide in fabric weave or carpet pile without detection.
Because clothes moths avoid light and prefer undisturbed spaces, infestations often start in items that go straight into storage: a box of winter coats in the attic, a rolled-up rug in the basement, or blankets tucked into a cedar chest. By the time you notice damage months later, the population has had time to establish itself.
Their Natural Habitat Outside
In the wild, clothes moths feed on keratin, the protein found in animal hair, feathers, skin, and horn. Their natural homes are bird nests, animal burrows, and carcasses, anywhere they can find a steady supply of fur, feathers, or shed skin. This is why they’re sometimes carried indoors on bird nesting material that collects in attic vents or chimneys, or on animal hides and pelts.
Once inside a heated home with a buffet of wool, silk, cashmere, and feathers, conditions are far better than anything they’d find outdoors. Stable warmth, low light, and minimal disturbance let them reproduce year-round instead of being limited to warmer seasons.
What They Actually Eat
Adult clothes moths don’t eat at all. They exist only to mate and lay eggs, then die. The damage comes entirely from the larvae, which are small, shiny white caterpillars with dark heads. These larvae can digest keratin, something very few organisms can do, which is why they target animal-based fibers specifically: wool, cashmere, silk, angora, fur, and feathers.
Synthetic and cotton fabrics are safe on their own, but larvae will chew through blended fabrics to get at the animal fibers mixed in. They’re also attracted to stains. Sweat, food spills, and body oils on clothing give larvae additional nutrients, which is why soiled garments are hit harder than clean ones. A pristine wool sweater in a sealed bag is at far less risk than a lightly worn one tossed into the back of a closet.
Two Species, Two Calling Cards
Almost all household infestations involve one of two species, and knowing which one you have helps you find them.
The webbing clothes moth is the more common of the two. Adults are gold-colored, about a quarter inch long at rest, with reddish-golden hairs on the head and fringed wings spanning about half an inch. Their larvae spin silken feeding tubes and patches of webbing as they eat, leaving behind tunnels matted with excrement and fabric particles. When larvae move to a new feeding spot, they abandon the old tubes, so you’ll see irregular webbing clinging to damaged fabric.
The casemaking clothes moth looks similar but has brownish wings with faint dark spots and lighter-colored head hairs. Its larvae behave differently: each one builds a portable silken case, roughly cigar-shaped and about three-eighths of an inch long when fully grown. The larva drags this case everywhere, feeding from either open end and retreating inside when disturbed. The case takes on the color of whatever fabric the larva has been eating, so a larva feeding on a navy blanket will carry a dark blue case. You’ll sometimes find these cases attached to the fabric at one end.
How Fast They Multiply
The full lifecycle from egg to adult takes roughly 65 to 90 days under typical indoor conditions. Eggs hatch in as few as 4 days or as many as 21, depending on temperature and humidity. The larval feeding stage is the longest part, and it’s the only stage that damages your belongings. After pupation, adults emerge, mate, lay a new round of eggs, and die within a few weeks. In a warm home, this cycle can repeat continuously, which is why infestations seem to explode once they take hold.
Cooler temperatures slow everything down. In an unheated attic or garage, larvae may take months longer to develop, but they don’t necessarily die. They simply wait.
Signs You Have an Infestation
The damage usually appears before you ever see a moth. Look for irregular holes in wool or silk garments, particularly in areas that were stained or sweaty. On sweaters or blankets, you might notice thinning patches where surface fibers have been grazed away. Webbing clothes moths leave behind silky tubes and matted webbing on the fabric surface. Casemaking moths leave their distinctive little cigar-shaped cases, sometimes still attached to the fabric.
The adult moths themselves are small, pale, and terrible fliers. They tend to scurry along surfaces rather than take flight, and they avoid light. If you see a small golden moth fluttering weakly in a dark closet or darting along the floor of a dimly lit room, that’s a strong indicator. Don’t confuse them with pantry moths, which are larger, more boldly patterned, and found near food.
Getting Rid of Them
Start by finding the source. Check every animal-fiber item in your home, especially things stored in dark, undisturbed places: winter coats, wool blankets, vintage clothing, felt hats, down pillows, fur-trimmed anything, and area rugs made from wool or silk. Pull items out of storage and inspect them in good light, looking for larvae, webbing, cases, or damage.
For washable items, a hot cycle in the dryer kills all life stages. For items that can’t be washed or dried at high heat, freezing works: hold the item at 0°F for at least one week, or at minus 20°F for 72 hours. Seal items in plastic bags before freezing to prevent moisture damage. A standard home freezer set to its coldest setting can handle this, but you need to verify the temperature rather than guess.
Vacuum thoroughly around closets, under furniture, along baseboards, and inside drawers where lint and hair accumulate. Larvae can survive on tiny deposits of pet hair, dust bunnies, and lint trapped in cracks, so removing these food sources is as important as treating the infested garments themselves.
Keeping Them Out
The single most effective prevention is storing clean clothes. Laundering or dry cleaning wool and silk items before putting them away for the season removes the sweat and oil residue that attracts egg-laying females. Store clean items in sealed garment bags, airtight bins, or vacuum-sealed bags.
Cedar and lavender are often recommended, but their repellent effect fades as the oils evaporate and neither kills larvae already present. They work best as a supplement to proper storage, not a replacement. Regularly rotating and wearing your wool items also helps, since clothes moths prefer undisturbed environments and physical handling disrupts larvae.
When buying secondhand wool, fur, or silk, inspect items carefully before bringing them inside. If you can’t inspect thoroughly, freezing the item for a week before adding it to your wardrobe eliminates any hidden eggs or larvae. The same applies to vintage rugs, antique upholstery, and any animal-fiber item with an unknown storage history.