cats scratch to "file" their nails. keeping their nails trimmed should keep them from scratching things, in general. sometimes cats are detracted from certain things that are meant for them to scratch on by really silly things, and then find something else for awhile. i would suggest NOT using any kind of spray or chemicals on your animal, and instead just tell them "no." and put them near their scratching post. there are many articles online that teach you to manage your cats behavior issues humanely. sometimes, tho, just realizing that it isn't behavioral, its grooming, helps, cos you can prevent the scratching in the first place.