Clothing stored away untouched? That’s vulnerable territory. If damage shows on stored sweaters or blankets more than everyday wears, infestation has spread beyond “just one area.”
Larvae move at night. If you flip off the lights and see movement or small hairs moving, that means large larvae are active, and you’ve likely missed their daytime hiding spots.
Believe it or not, some people get rashes, itchy spots, or respiratory irritation from larval hairs and shed skins. If you or your pets are reacting, that’s a sign they’ve been around long enough to leave allergenic material.
I once discovered a section of upholstery under my couch was hollow-sounding—removed it and saw larvae, frass, and holes. Furniture, drapes, and padding are favorite hiding zones. Not just carpets.