Rat and Mouse-distributor for the whole house

I want to assess the rat and mouse-distributor for the whole house positively. It seems to me that the device is working. I have in my living room a wall of wood, which was attended in recent years of unwelcome guests, especially in the winter and fall months loudly. I can make access to the wall from the outside and not find me so remained only the demolition of the wall or a Verschreckungsmöglichkeit. It seems to me that the device shows its effect, because I heard a rustling in the first wall. This is usually followed by a big rustling not aufhörendes hiking and nibbling from one or more mice. The devices I put into the socket and nothing happened more. I would distribute five stars, if I knew that the problem is really solved forever and I do not have to pull down my wall.