I have never had mice in my TT, but in my home.....you betcha. Our home boarders an undeveloped field. Every fall the mice would invade. Last fall reading about mice in TT's I read about Fresh Cab. It sounded to good to be true, investigated several websites and saw nothing but good reviews so I figured it was worth a shot. Not 1 mouse last winter. Still don't know if it was just an off year for mice or if the Fresh Cab really worked. I will tell you come spring. I just bought a fresh batch and placed it throughout my home, garage and TT. If the mice stay away I will be sold for life.