How do you remove stick-on hooks?
I have had success sawing through them with dental floss. Get an 18" piece of floss. wrap each end around your fingers or a pencil. Slide the floss behind the plastic section. while applying a downward pressure on the floss, move it back and forth left to right until the hook separates from the adhesive. Once you have access to the adhesive you can scrape it off or use an adhesive remover like GooGone, rubbing alcohol or citrus based cleaner.