Try the whole house foggers, then. They usually take care of infestations.
Sounds like you don't just have the regular, annoying infestations we all get, but a breeding ground somewhere in, around, or under the house.
I use the foggers for house centipedes. Nasty, disgusting, vile things! Harmless, but they're ugly and can get get HUGE.
Foggers work great, but you must
follow the instructions to the letter. They're dangerous if used incorrectly.