I used different peciedists suck as Bifen IT and a Termiticide, neither seemed to penetrete their hard shell. I did however used a tire foam spray on them, and it suffocates them and they fall off the house. Also take a lighter to it and lite em up! For older windows which they can get through cracks, use glue boards, even duct tape will catch them. I'm in the process of replacing existing orginal windows with pella pro lines and after replacing 7 windows earlier this year, the stink bugs cant get through the pella pro line screens, Great stuff for windows is a must for older windows, if you can find a crevice to inject the foam in, do so! It will also help insulate your home. I tried hot water, and they fell right off the screen, Also used bleach, and pb blaster on them to make them suffer. I have 13 hens that are first line of defense on my land for insects as they love to forage on lots of different insects, but when these little stink bugs are on the house it is impossible for the hens to get to them. Too bad the climate isn't warmer all year round like florida, then I would have chamilians all over the place catching them. I can deal with chamilians.