I have tried the peppermint and am now trying Moth Balls! I heard that rodents don't like that smell and have a problem with the chipmunks tearing off my dryer vent (its a plastic cover that I need to duct tape on) and when they get in there it sounds like they are coming in my register vents! Its beside it,cannot imagine having one come in the house! So I went around the outside of the house and put a few moth balls wherever I thought they could get in -haven't heard him since,then I sprinkled some around in the garage where we've had mice coming in.Have traps out there also and haven't caught any,so hopefully its working!