If you’ve spotted a moth fluttering around your room, you can catch it quickly with a glass and piece of paper, or simply clap it between your hands. But the more important question is why it’s there. A single moth that wandered in through an open window is no big deal. A moth that came from inside your home, from your closet or your pantry, signals a problem that won’t go away on its own.
Catch the Moth, Then Figure Out What Kind It Is
The fastest way to deal with the moth right in front of you is low-tech: turn off the lights in your room and turn on a light in the hallway or bathroom. Most moths will fly toward the brighter light source, and you can guide them out a window or door. If that doesn’t work, trap it against a wall or window with a cup and slide paper underneath to release it outside.
Before you move on, take a look at what you caught. The two indoor moths that actually cause damage look quite different from the large, dusty-winged moths that come in from outside at night. Clothes moths are small, about the size of a fingernail, and pale gold or buff-colored. They avoid light and tend to scurry along surfaces rather than fly toward your lamp. Pantry moths (also called Indian meal moths) are slightly larger with distinctive two-toned wings: copper or reddish-brown on the outer half, gray closer to the body. If either of these is what you’re seeing, the moth in your room is a symptom, not the problem.
Check for Signs of an Infestation
Adult moths don’t eat your clothes or food. Their larvae do. By the time you see a moth flying around, it has likely already laid eggs somewhere in your room, closet, or nearby storage area. The real damage is happening out of sight.
For clothes moths, check wool sweaters, silk scarves, cashmere, fur, and anything made from animal fibers. Look for small irregular holes, silky webbing or tiny tubes clinging to fabric, and sand-grain-sized droppings that match the color of the fabric the larvae have been eating. Pay special attention to items you haven’t worn in a while, garments stored in dark corners of your closet, and areas where lint and pet hair collect along baseboards or under furniture. Clothes moth larvae can also feed on carpet edges, especially wool rugs tucked under furniture where nobody vacuums.
For pantry moths, inspect dry goods: flour, rice, cereal, oats, dried fruit, nuts, pet food, and birdseed. You’ll find webbing inside packages, small caterpillars crawling on container walls, or clumps of stuck-together grains.
Kill Larvae and Eggs With Temperature
Once you’ve found the source, temperature is your most reliable weapon. Laundering infested clothing for 20 to 30 minutes in water at least 120°F kills moths at every life stage, from eggs to adults. For items that can’t be machine-washed, you have two options: heat them in an oven at 120°F or higher for at least 30 minutes, or seal them in a plastic bag and place them in a freezer below 18°F for several days. The freezing method works well for delicate items like vintage wool or silk that might not survive hot water.
For pantry moths, the approach is simpler. Throw away every infested package. Don’t try to salvage a bag of flour with webbing in it. Then wipe down all shelves with warm soapy water, paying attention to cracks and corners where eggs can hide.
Use Pheromone Traps to Monitor the Problem
Pheromone traps are sticky boards laced with a synthetic version of the scent female moths release. They attract male moths of the target species, which fly upwind toward the scent and get stuck. These traps won’t eliminate an infestation on their own because they only catch males, but they serve two useful purposes: they confirm what species you’re dealing with, and they tell you whether the problem is getting better or worse over time. You can find traps designed specifically for clothes moths or pantry moths at most hardware stores. Results can be hit or miss if the moths aren’t nearby, so place traps close to where you suspect the infestation, inside closets or on pantry shelves.
Skip the Mothballs
Mothballs are one of those old-school solutions that cause more problems than they solve. They contain either naphthalene or paradichlorobenzene, both of which are toxic to humans and pets. If you can smell mothballs, you’re inhaling those chemicals. Short-term exposure causes headaches, nausea, and eye and nose irritation. Naphthalene specifically can cause a type of anemia where red blood cells break down faster than normal. It’s also classified as a possible carcinogen, and prolonged exposure has been linked to liver and kidney damage. Children and pets sometimes mistake mothballs for candy or food, which can cause serious poisoning. There are better options.
Prevent Moths From Coming Back
Moths thrive in specific conditions: darkness, stillness, humidity, and a food source. Removing any one of those makes your room far less hospitable.
Clothes moths breed fastest when humidity is between 75% and 90%. At those levels, they can go from egg to adult in under a month. Running a dehumidifier in your closet or bedroom, or simply keeping air conditioning on during humid months, slows their lifecycle significantly. Opening closet doors regularly to let in light and airflow also helps, since moths prefer undisturbed, dark spaces.
The single most effective habit is never putting worn clothing back in your closet without washing it first. Even if a shirt looks clean, it carries skin cells, sweat residue, and microscopic food particles that attract moths. This is especially important for wool, silk, and cashmere. For seasonal clothing you won’t wear for months, store it in vacuum-sealed bags or airtight plastic bins after washing. Seal the edges with tape if the lids aren’t snug.
Vacuum regularly, and not just the middle of the floor. Run the vacuum along baseboards, under furniture, beneath radiators, and in closet corners where lint and hair accumulate. These are the exact spots clothes moth larvae feed and grow unnoticed.
If you buy secondhand clothing, wash everything in hot water (at least 120°F) or have it dry-cleaned before it goes in your closet. Thrift store finds are one of the most common ways clothes moths enter a home in the first place. Cedar planks or blocks placed in storage containers can provide an extra layer of protection, as the natural oils repel moths without introducing chemicals into your space. Cedar loses its potency over time, so sand the surface lightly every few months to refresh it.