Steam won't help you with leather wrinkles. You'd burn the coating off the leather way before you got it hot enough to have an effect on wrinkles. When you steam leather the correct way you almost never stop moving the steam head (which already has a microfiber or terry towel clamped on it) for fear of burning the seat.Steam is supposed to put moisture into the leather and relax the wrinkles just like clothing. Alot of the cleaners people use actually dry the leather causing it to wrinkle from tightness.
Steam will clean some surface dirt and oil.Does anyone have any experience using steam to clean leather seats? I also heard that steam will take all the wrinkles out of the leather.