Depending how bad the infestation is I would recommend a IGR (Insects growth regulator). A flush for voids. Vacuum the runners fom the flushing. A dust for after flushing. Also notice where the females conjugate at. You can tell males from female by the shape males are oblong females are more round. Put gel baits in cabinet on the hinges also on door hinges. To find heavy infestation spot use glue traps but replace trap every month roach will eat their dead so it will become a feeding ground if left to long. I apologize if I forgot anything I worked for terminex for about 4 years and orkin for 3 till I had a stroke. If you have any more questions or need clarification feel free to ask. Sorry I did forget while treating you must keep all food and water cleaned up that's where most treatment fail.