How can the sticker be easily torn off?
Vinegar is a good helper to decompose sticker glue. Dip a paper towel or cloth in vinegar, spread it evenly on the label paper, and let it stand for 10 minutes, then you can easily tear off the label paper.
Detergent: Apply detergent to label paper and let it stand for ten minutes, then tear off the label. Or pour the essential balm on the label paper and remove it after five minutes.
Soap with a little mixture of ammonia and turpentine can remove stickers and stains and make the glass surface more shiny (suitable for tiles, ceramics, glass, etc. ).