borrow a ferret, place the MH away from the house, a large parking lot would be nice. Place the ferret with a days food and water inthe mh, leaving a top vent or two open.
Wait near the mh, watching for the ferret to sneak out, enjoy the show of the mice leaving. Mice should start leaving within 15 minutes, Ferret may sneak out at any time. Rodents will smell the ferret and run like the dickens to get away, the ferret will catch and eat a few, but the smell of the ferret is a super deterrent for rodents of all kinds.