We are getting ready to close up our seasonal cottage in Ohio. The mice move in over the winter and get into the furniture and chew/leave droppings/build nests. I just bought two sleeper sofas and don’t want them in there. Do moth balls help? The poison in the boxes is not working-they just scatter it everywhere and we have a ferret we are afraid will find it next summer. Any ideas or anyone else have this problem? We had the place sprayed for carpenter ants in the summer. Will this deter the mice? Thanks for your suggestions!