I once while on a job,removed a electric swich outlet cover, where roaches exited the wall box runing for their lives. So removing outlet covers, then zapping the bugs at night when they come out of hiding might yield best results. A second application, or maybe a longer first application? Furter testing should answer those questions. More or less final test results time line? My best guess is before the end of the year? If I had a machine today, I would buy some feeder insects (grass hopper etc) frome the local pet shop. Place the bugs in a screened box in a room. Gather as many regional hotel,hosp and restaurant managers as possible for a free demonstration. Word would travel fast.