Step one, there is a small depression on the surface of the car here.
Step 2: Prepare a pot of hot water first.
Step 3, pour the hot water inside on the concave surface of the car door.
Step 4, after completion, prepare a toilet cover.
Step 5, put the toilet plunger against the concave part of the car, and then pull it down hard.
Step 6: Try the door several times with the toilet plunger.
Step 7, it shows that the door depression has been restored.