If they are clothes moths, you must eliminate the source. Then fog the attic twice, 2 weeks apart. They could be in fur, feathers, wool, hair, or silk. If they are Indian meal moths, the same treatment will work, but the food source is seeds and nuts, which may have been placed there by squirrels or other rodents. An additional treatment would be a clothes moth trap such as the Safestore| X Lure Cloth Moth Traps for Webbing clothes moths or Pro-Pest Safestore Casemaking Clothes Moth Traps.