Food storage areas like pantries and cabinets need to be vacuumed thoroughly, including the crevices between floor boards, the corners of cabinets, and areas where mice may have hoarded things like dry dog food. A bird nest within a home can also provide a haven for drugstore beetles, and a professional may need to be consulted to address this. Lowering home humidity levels can be helpful as well. While the use of chemical insecticides may be undesirable in food storage areas, Food Grade diatomaceous earth can be useful sprinkled in corners or even mixed into bird seed (diatomaceous earth is edible, but inhaling it should be avoided).