Do plug in mouse repellents work?
They do work. The people who think they don’t simply do not realize the limitations and capabilities. These will annoy the mice enough to induce them to move to other less-offensive homes. The trick is, they only work roughly in line-of-sight. They do not work through walls, or well-fitting doors. Not into tight cabinets, either. So, you may need more of these things than you have now. My friend had mouse troubles, and learned she needed one per room, one for her attic eaves, and two for her big garage. She may have spent $100 on them, but now she is mouse-free. Plus, you don’t have to deal with dead mice. Plus again, you are not actually killing anything.