Antifreeze! The mice love it! Just make sure dogs, cats, etc. can't get into it...they'll like it too and get poisoned.
They'll drown in the antifreeze. (the mice). A friend (who has a bunch of Deuces and 5 tons as well) showed me this in his garage/shop/pantry. It works! A gallon's worth had about five dead mice in it! (I know, we strained all the mice out before reusing the antifreeze elsewhere).
Water works too, especially a toilet. Amusing side story: We had this house (In Atascadero, CA if you're wondering what region/critter types) with a 1/2 bathroom in the garage (just a toilet, not even a sink). It was almost never used, sometimes literally not for months or even years at a time. There was about a 2" gap under the door (concrete floor in the garage and asphalt tile floor in the small bathroom, no threshold) so the mice easily got in there. Mom's ex-hustband-but-they-were-going-to-remarry goes to use that bathroom one day, and finds two dead, decomposing mice in the toilet!