How to clean the elevator door of the hotel?

First, clean the elevator you want to post with a towel. Then, fix the picture in the upper two corners (to paste a photo and other materials, you can paste it directly by tearing off a layer of film on the back). Then, you let your colleagues put it down slowly. You take a towel and rub it down bit by bit to balance your attention. (This requires experience) But if you have done it, it should be no problem. Finally, if bubbles are found in some places, cut the bubbles with a needle or a small knife tip.