If you can remain out of sight and use remote punishment, your cat should learn without fearing you. (tampabayvets.net)
Placing a bell on cat's collar to track cat's location in house and scratching activity can help with the appropriate delivery of remote punishment (water squirt) for scratching behavior. (oregonvma.org)
Remote punishment consists of using something that appears unconnected to the punisher to stop the problem behavior. (homevet.com)