wheelrider said "We get them by the hundreds on the south wall of our house. We have tried different bug brand products and they never worked. The only thing we have found that works is water with dish soap and spray them down. Rinse your wall down after to avoid soap scum. "
I have been doing this for the last couple of years. It works really well and yes, after the bug season is over, I spray down the house and the fence and they look new again! Solves two problems - the bugs and the dirty house/fence! LOL