Bests & Worsts Reviews from Amazon

It's double-sided sticky tape. Pretty simple. But as a 4x cat owner and 3-year cat foster parent, I have a pro-tip for the cat owners: put the sticky tape on a piece of cardboard (or something equally useless but firm), and then put the cardboard on top of/beside the undesired-scratching object. Thus, just toss the piece of cardboard away when no longer needed. No need to worry about the tape ruining a piece of furniture, and the cardboard is not clear like the tape, so you can see where it is (note that this WON'T help those who are stumbling around at night with the lights off - another pro-tip). I specifically use the tape to stop my cats from scratching at my door 20 minutes before my morning alarm clock. They are tall enough to reach the doorknob and bat it around, and I can't very well tape the doorknob. So I unfold an old cardboard box, tape it up, and set it in front of the door. I cut it long enough so the cats can't reach the door over/around it, and I can easily pick it up and set it aside when we have company. I've also used it to stop a fresh-off-the-streets foster cat from pooping directly beside his litterbox. I taped up cardboard and put it all around the box, save for one small (~6") space to allow the cat to get to the box - theory being that cats are super clean animals and would not like to step on or around his waste to get to the box. Worked like a charm! He immediately stopped pooping outside of the box and started pooping IN the box, and he never did it again for the 4+ months we had him, even after the cardboard was removed.