Just blow it off with a hair dryer for 30 seconds, then gently tear it off without leaving any traces.

If you have torn half of it and it is very sticky, then use what we commonly call "Fengyoujing" dipped in a paper towel or cotton ball and rub the area a few times, and it will be completely removed. Yes, if you don’t believe it, you can try it, it works very well.