I am with the others who it didn't work for. 100% peppermint oil and I actually saw a large flux of activity. We have been infested in our apartment and cannot figure out where the heck they are coming from. They eat holes all in the carpet to get in and out. Lined the areas with wire mesh, maintenence filled holes in kitchen and still coming in. Used this and have seen/caught way more mice than before the application. Someone said they wondered if the mice saw it as a scent of food and I wonder that myself. I am so frustrated, I don't know what to do. These things are making me a absolute wreck.