1. Blow hot air at the label with a hair dryer, so that the label can be easily removed after heating.
2. Wind oil essence, put a little on it and wait for two minutes to remove it by hand.
3. Apply alcohol or gasoline, then rub it back and forth with your hands, and finally wipe it off with a cloth.
4. Nail polish and hand cream are also good things, which can dilute and dissolve those non-stickies when coated on the label.
5. You can brush off the steel ball with water, but it is not recommended to use it on precious metal articles.