One way of doing that is to fog the house with one of those bombs. We used
to have silver fish and other creepy crawlies crawling among my prints.
After we bombed the house with the bombs we got from our vet to get rid of
fleas, no more bugs! That includes the bugs used to plaque our houseplants.
Putting in another dehumidifier probably helped also, since this is South
Carolina afterall.
Sam