Use a soft brush to brush away any loose dirt and debris. If your boots are extremely soiled, use cold water and a clean sponge or cloth to remove any dirt. Do not soak the boot. 
Then apply an approved suede clearner, following label instructions, apply a small amount to a clean sponge or brush, and scrub lightly.
Rinse in cold water and place your clean boot in a warm, place to dry slowly. Do not blow dry or place your boots in a dryer. Once completely dry, lightly brush to freshen up the sheepskin. 
We recommend using an approved suede stain and water repellent product, following label instructions, to condition and protect the boots. The product must be completely dry before use.