Bringing Trailer in for Service - Need Advice

Spray foam to keep rodents out may not be effective because they can knaw through it. Steel wool quickly rusts and needs to be replaced. I've had good luck using stainless steel scouring pads from the dollar store. You can tease the pad apart which will give you a long tube. Then wrap it around plumbing or wiring until it fills the hole. The hardest part is finding all the possible entry points and even harder sometimes to access tthem. As a back up I put some glue pads and poison bait out. So far this winter nothing has been trapped, no bait has been eaten, and no other evidence of mouse activity.