1. Use a hair dryer: Use the heat from the hair dryer to soften the glue on the back of the glass sticker, then blow it while scraping it with a card, and finally wipe it clean with a cloth.

2. Use Fengyoujing: Just pour Fengyoujing on the sticker, wait until it penetrates into the sticker and soaks, then wipe it back and forth with a dry cloth.

3. Use alcohol: Put some alcohol on the sticker, it will soften quickly, then wipe it clean with a cloth.