Although there was no sound or sign of mice taking up residence, for some time we had a small visitor using our living room, once or twice a week, presumably as a short cut. Whence he came or went, remains a mystery. One night, rather than the usual stamp on the floor, I chased him. Probably lost his sense of direction and sort refuge under the washing machine in the adjoining kitchen. In the morning there were signs he had made his way to the work tops and had apparently enjoyed a banana supper. Urgent!! Action needed! traps were out, and not wanting a too costly repellant, with reservations, opted for Pest-Stop 500 3 pack. I placed one at each end on opposite sides of our large living room and one in the kitchen. The first night our friend appeared, sat in the middle of the floor looking rather disorientated then quickly disappeared. Eureka!! six weeks on there is still no sign of our little pest. PS.. our colony of spiders have also disappeared. Apparently, Pest-Stop 500 has worked for me and would recommend.