I found a hole in the garage last year and sealed it but the mice are back in ceiling. The ceiling is panels so I can get up there to set traps. How can I keep mice out?

They are more of a seasonal problem and we are approaching their big season, cold weather. They can get through an opening as small as a dime so search everywhere. I'd use a poison mouse bait rather than a mechanical trap. d-CON® America's #1 Rodent Control Brand (http://www.d-conproducts.com/products.html) Just stop by ACE or any hardware store or home center.