At my folks home, where I still live for now, our computer is at and next to it is a pool table with a cover on it. Anyway, as I'm working on the computer I hear the sound of something small hit the pool table with a 'tap'. I look over to see a black winged bug apparently having burned itself on the light above the pool table and proceed to squish it in a napkin, thinking nothing else of it. Until it happens again...and again...and again. Next thing I know I have like 15 napkins of squished bugs in our wastebasket. I tell my Dad whom also said he had squished some previously as well and we start to look around for a source of where they're coming from and see one coming up from between the wood area under a window. These little buggers have apparently gotten into the basement walls of my parents home. We realize we must have a few nests now in the walls alongside the basement windows, which is where according to our research online tells us as an indication of where they be by little piles of sawdust and stuff. So my Dad sprays the areas in hopes of dealing with them, until I read how liquid insecticides aren't the way to go, but some kind of dust like substance. My Dad worries about having to have a massive bill as a result of an exterminator coming out and would like to deal with this in a way that won't be insanely costly. I would also like to not have to keep squishing the buggers or looking over at the pool table everytime I hear a 'tap' noise. Anyone else have problems with these pests?