mice do not like peppermint oil
they also do not like steel wool
stuffing cracks, holes, spaces and sprinkling a few drops of p. oil have stopped the mice from visiting my kitchen (yuck)
look for droppings. look under the sink. i had to stuff some holes around the pipes. they dont need much space to get in. my mice were coming in thru the cellar, under the kitchen sink and then behind the cupboards, up the back of the stove.... i found more evidence after a few weeks and stuffed more steel wool at the back of the cupboard.
hope there are no creatures stirring at your house christmas eve!