The mouse doesn't like incense
Sometimes I hear what I think is a mouse nibbling away at something in the wall or behind my dresser. If I take a step on the floor or make a noise it stops for a minute then starts up again. Read somewhere that burning incense drives them off because any smell of burning is a sign of danger.
So.... I've been giving it a try. One small incense cone keeps it away for hours.
Apparently they can get used to a scent though so I may have to try a new tactic eventually.