I've dealt with them before. I got a bunch of those catch and release traps. Put peanut butter on a cracker in one end, leave it over night. In the morning I'd round up the traps that caught mice and let them go in the woods. It depends on the scale of the "infestation", but if it's only a few mice it can take days to a week to catch them all. It pays to set up a trap in as many rooms as possible.