I have tried many things to either keep the mice away (I *thought* I filled all the holes they could get in at...guess not!) or kill them(when regular snap traps didn't work for an extra-gingerly-eating mouse, a small stretchy hair band wrapped around the trigger and carefully baited works better). Before anyone goes off on me for not live trapping and relocating the mice....I would be doing that quite frequently in the fall/winter and I just don't have time for that! It's not that I've never done this(I have), but it's not something I want to add to the daily chore list.
I have read about using Peppermint Oil to deter mice, but was pretty skeptical about it and used other techniques instead.
Until the last time the varmints got into my silverware drawer/cabinet that I had just cleaned out! That is soooo aggravating, not to mention gross!
So, in desperation, I got out the Peppermint Oil and cotton balls. I put 3-5 or so drops per cotton ball and put them at the back of each of my drawers in the kitchen.
Guess what? So far, NO sign of mice in the kitchen! Yippee! And when I open the drawers, it smells like Christmas!
I assume I will have to refresh the cotton balls ever so often, but am thankful that (so far) it is working.
(and my hubby got me a live mouse trap to put on the kitchen counter just in case--much better than a snap trap