1. Wipe with vinegar. Dip a dry dishcloth into white vinegar or vinegar or soak a paper towel in the vinegar, and then completely cover the area with the label. After it is completely soaked for a period of time, gradually wipe it off along the edge of the self-adhesive label.

2. Wipe with industrial alcohol or gasoline. First of all, the object to be cleaned must not be afraid of alcohol corrosion. If there is no ordinary liquor, it will work, but the effect will be less. Use a rag soaked in alcohol to completely soak the sticker, wait a moment, and then gradually wipe it from edge to inside with the rag until it is completely clean.