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Steel Wool
This is the key material I used to plug the factory holes in my Gladiator bed. I went with very coarse steel wool, ripped off pieces, and stuffed them in because mice can’t chew through steel wool. Then I covered it with tape to keep everything in place.
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Pros
- +Mice can’t chew through steel wool
- +Easy to rip and fit into odd-shaped holes
Cons
- -Needs something (like tape) over it to keep it from shifting or falling out
