How to keep cat out of the mechanism in our FW's bed

Mint oil, lavender oil, lemon oil, eucalyptus oil, menthol, and things like that will repel cats. I listed them in ascending order of powefulness.

If the pure oils aren't easy to find where you are, try some lemon eucalyptus based mosquito spray! Easy to apply, and useful to have when camping :).

Many cats like the challenge of trying to get into a place you are trying to keep them out of. Make the place unappealing to them instead.