I have tried all kinds of things and still use most of them. Snap trap with peanut butter. If the cats get one I take it away (live) and throw out the door (mouse not cat). I have sealed. I have used moth balls. I have used moth blocks. If you must trap them, do not use glue traps - it is inhuman for them and I had a cat get stuck in one once. Disaster. She freaked and I had to cut out a chunk of her hair. Poison is bad if you have pets. Puts traps along the walls or against surface in cabinets. They like to run along something. I try my best to keep them out or not kill them but sometimes you don't have much choice