If mice are getting into some place where you don't want them, and you want to be humane and not kill the mice, there is an easy tip to keep mice away. Dryer sheets. Put a scented dryer sheet in the area where you are getting mice, and the mice will go away since they really dislike the smell from the dryer sheets. You need to replace them every week or two to keep the smell fresh and strong, but if you do this it will keep mice away in a humane and safe manner.