OK - we've tried everything - Sticky Paws, spraying that "No-Scratch" spray on the couch, we have cat posts and cardboard scratchers near the couch, etc. Nothing seems to work for one of our cats - Leo - he insists upon scratching the couch - Claudia has done it too, but it's rare for her to do it.

My question is this - is there any substance that we can apply to those corners of the couch that is a scent/taste that cats cannot stand, so I can see if that will deter Leo? Something that won't mess up the couch's color, etc.?

Please let me know if any of you have any ideas. Thanks!