Mice are attracted to food sources and shelter, so the best way to mouse proof a cabinet is to remove any potential food sources and make sure the area is clean. Store food in airtight containers and keep the cabinets clean of crumbs or spills. Mice also like to nest in soft, warm materials, so if you have any cloth items stored in the cabinets, be sure to store them in airtight bins as well. Finally, seal up any openings or cracks where mice could potentially enter the cabinet. By following these steps, you can help prevent mice from taking up residence in your cabinets!