Hi Maybe you should try getting one of those sonic emitter plug-in yokes-You'll find them in most hardware shops.We had loads of creepycrawlies and a couple of mice( a new house problem due to disturbance of nests by building work)-we put down traps for the mice, and got a sonic emitter as insurance to keep the vermin away, and as a bonus, we got rid of the insects also! Iknow some people think their rubbish,but they're worth a go IMHO...daithi