On our air conditioner, the refrigerant pipe goes in to the attic at the side of the house. Well, the foam insulation has been chewed off, exposing the copper tubing, and a nice size hole now goes into the attic. I know mice(?) don't like steel wool, but I can't put steel wool up next to the copper can I?
Any ideas of what to plug the hole with that is difficult/unpleasant to chew thru?
Any ideas would be appreciated.