Cats don't like aluminum foil. Maybe put a strip along the edges for a few days until they get the idea. I understand they also dislike sticky stuff, but that would be hard to do and still live there.
I put foil on the arms and fronts of my padded chairs when Dale decided to use them for scratching posts. It redirected her to the actual scratching post right next to the chairs.
Worth a try.
Mary
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