just for clarification before someone jumps all over my last post...
The bombs do work great to kill any bugs that are exposed when it goes off. The gas expands, fills the room but does not seep into the cracks and crevices(where they are probably hiding), thats why you need flushing agent for an infestation, and the bombs dissipate 100% leaving no residual chemical to kill any that come out of hiding afterwards, also do not help when the eggs(where there are bugs, there are eggs) hatch and you are back to square 1.
Dam, you know your shit