First of all, remove the seats from the car, and then clean the car normally, by drying it in the sun, or else use a sponge to clean it. Dry your seats as follows before placing them back.. 1.Use a damp cloth or sponge to rub saddle soap into the leather; work soap into a light lather.. 2.Wipe away lather and allow to air dry.. 3.Oil leather with a leather preservative such as mink oil.. It is a very delicate job as it can spoil the shade of your leather accessories. Always try it on a covered patch of the fabric before doing it on the entire seats.