I had mice invade closet and was successful with Irish Spring soap. I kept the closet door closed. My dresser is next to Paco, will fresh peppermint or peppermint tea be safe. I think the mice have gotten used to the soap. I have looked the entire room trying to figure out how the mice are getting in. For 7 years I had an Amazon and a Cockatiel in the same room and no mice. I keep Paco very clean, cage twice a day and floor vacuumed, food in air tight containers. I'm at the end of my rope!!!