Sorry roach devotees, quarry got to go! Necessitate some aid. Cockroaches rejecting Advoin.

I've taken possession of a property from some bad tenants, and before I hire a professional I have tried to go it alone.

It's German roaches here in America (California Central Valley).

Using Advoin as directed, the roaches seem to ignore it completely. After a day or three in this hot weather, it tends to dry out. I've been using it for two weeks now with no indication that it works.

Any tips?

On another note, those "Room Foggers?" Yea, useless. As far as I can tell it just makes the roaches reproduce faster.

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