If you have car leather that has been stained with something, there are a few things you can do to clean it. The first is to try to get as much of the stain out as possible. This means using a mild soap and water solution, and then rubbing the area with a cloth or a piece of paper. If the leather is very dirty, you may need to use more than one solution. The second step is to dry the area. This means using a dryer and making sure that the area is completely dry before putting anything back on it. Finally, if you have any kind of protection against staining, put it on the leather and let it sit for at least an hour before trying to use it again.