Wrinkling is a normal phenomenon in use, which can certainly not be improved by ironing, but will damage it. If it's a small part, don't worry about it. If you are a perfectionist, you can't stand it. If the area is too large, you can selectively deal with more wrinkles.

If it's not serious, wash the tea with foam cleaner several times. It can be better, but it can't disappear completely. Personal opinions don't need to be too entangled in these details. Find a pin. Where there are wrinkles, insert the needle tip forcibly and pick out a small part. Don't insert the soft ceiling too deep. When picking, grasp the strength and don't use too much force. Pick slowly along the edge of the wrinkled ceiling.

In this way, you can easily deal with the problems you are worried about. If your car roof is hard and wrinkled, this method is useless. Just pull down the ceiling at the skylight, reach in and press it. Close to the door, pull down the waterproof tape of the door frame and remove the inner handle.