I’ve been trying concentrated peppermint oil in the garage. No mice in the garage this winter. Not very scientific. No zombies either. There was (maybe still is) a mice plague out west and I thought there might a few heading our way. We were also planning to attend a tour of the central west a couple of months ago and I was thinking of how to keep any unwanted mice from getting into the 4C when it was to be parked outside for the night.