Avoid machine washing your sheepskin slippers, they should be washed only by hand. Fill an average size bucket with cold water, add a spoon of wool detergent and mix thoroughly. Immerse your slippers completely in the mixture, letting them soak for 5-10 minutes. While still immersed, rub down lightly with a sponge. When done, rinse them thoroughly in cold water and let them air dry naturally in a cool place. While they are drying never expose them to direct sunlight or use a heater or hair dryer to dry them.