Prevention
for House Mouse
Start by shutting the mice out: close off any gap wider than ¼ inch, since a mouse can squeeze through an opening only slightly larger than ¼ inch across. Source: https://extension.missouri.edu/g9442 Pack small openings firmly with copper or stainless steel wool; ordinary coarse steel wool plugs a hole in a pinch but rusts in time. For bigger or permanent fixes, cap the gap with a chew-proof material — concrete, galvanized sheet metal, brick, hardware cloth, or aluminum. Source: https://extensionpubs.unl.edu/publication/g1530/2003/html/view Clear clutter and harborage that lets mice nest near warm spots like water heaters, ovens, and refrigerators. Source: https://extensionpubs.unl.edu/publication/g1105/2012/html/view