1, you can spray some water on the wall with glue, and then find a soft rag to wipe it off gently after the glue softens. Be sure to pay attention to the strength of your hands when wiping, so as not to accidentally wipe off the wall ash and leave a small pit, which will look ugly and affect your future impression. 2. You can also wipe it with an eraser dipped in alcohol. If it can't be wiped off, you can also scrape it with a blade. These methods will cause some damage to the wall, so use them with caution. Related knowledge science: 1, you can also use a hair dryer, plug in the power supply, and adjust it to the hot air state. This heat is very high. If you keep blowing air on the glue on the wall, the glue will soften slowly with the increase of temperature. It will eventually fall off, and this method will not cause too much damage to the wall. 2, you can buy online cleaning agents to remove glue, which is very powerful. You can also remove the sticker from the wall. You can also dip a little vinegar juice in the non-stick position to make it soft, and then wipe it with a dry rag to see if it falls off.