Box Elder Infestation

As spring approaches, we are learning that our new place has a serious box elder bug problem. It started with just a few in the basement...then it was more downstairs and on the main level...then small groups on the outside of the house and workshop. But on Sunday it culminated in the grossest display of box elder madness I've ever seen. SWARMS of box elder bugs covered the East side of our house in massive clusters. DISGUSTING! It will give you the heeby-geebies just to look at these pictures. '
After doing some research, we heard of a couple different methods of getting rid of them. We are experimenting. On our house we sprayed a highly toxic pesticide called "Buggslayer" (that's what JP is doing in the picture below). So far it seems to be working, but its hard to tell since it has been chilly out since we sprayed and the bugs usually come out when its warm. On the workshop we sprayed a simple mix of laundry detergent and water. We've heard from a few people that this works, so we'll give it a shot as a safer alternative to the pesticides. Any other tips are accepted!