mice can chew through anything you put on it. None of the wise tails works.
What I do it, clean everything very well. I also crawled under my unit, and filled every tiny hole, with steel wool and marine caulk. I did the same from the inside Looked for each penetration in the floor, filled with steel wool and caulk. I have never had an issue, and our unit is kept on a farm all winter.
A friend has issues with his, we think his mice are getting in at the slide out penetrations. We are still trying to decide the best solution to remedy this entry point.
I also put, sticky traps and bait blocks around the TT. So far, no signs of mice.
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