The traditional mothball contains pesticides that kill clothes moths. These pesticides are also harmful to humans and animals if ingested in inhaled in high doses. A mothball typically contains either apthalene or paradichlorobenzene, fumigants that have chemicals that vaporize at about room temperature. Oregon State University Extension Service says naphthalene can cause headache, dizziness, nausea and difficulty breathing, while paradichlorobenzene poses less of a risk but is still hazardous. Mothballs also come in cakes, crystals, tablets, bars and flakes. Always follow label instructions carefully, placing the mothball in an airtight space, like a garment bag or container.
Always follow the mothball's label instructions and warnings. Disregarding the instructions is actually illegal in the U.S. Don't use mothballs in your closet to get rid of a pest other than a moth. Keep mothballs away from children and pets by storing your treated clothing on a top shelf or securely in the back of your closet with a childproof latch or lock.
Cedar boxes and sachets filled with cedar chips repel some moth species, but they're not a guarantee. They do, however, give your closet a pleasing smell. Lavender also repels only some moths. If you choose to go this natural route, supplement your moth protection by storing cleaned clothing in airtight containers, and vacuum your closet often to remove anything for the moths to snack on.
Protect your clothing from moths before they get into your closet. Clean any clothing you're going to store, and place it in an airtight garment bag or container. If your clothes have already been infested with moths, vacuum out all closet drawers, shelves and floors, as well as your bedroom drawers and chests. Remove human hair, pet hair, lint and any other food sources. Throw away the vacuum bag after cleaning.