Peppermint oil on cotton or absorbent material in areas where they go or come in will send them away. A live trap called tin cat is great in that when caught you put them in the woods for nature. Owl food and the like. It becomes fun to catch and release. Use care that they do not stay unattended in the tin cat for too long as they would suffer. Suffering is not nice and comes back to bite you in the butt.
You can try every remedy everyone suggests but until you plug up the hole where the mice get in, you will not solve your problem. Find that hole and plug it with steel wool, or something that mice will not eat and your solution is accomplished.
Old fashion snap-traps seem to be the best. Peanut butter, real butter, or raisins seem the most attractive and effective as bait. Moth balls where they come in will help keep them out. There is a reason they are coming in and one reason may be food supply. Find out if it is shelter or food. If food, also eliminate that supply.
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