Firstly, you could apply a special waterproofing agent for leather. Jumbo Ugg Boots sell a brand called UGG Water & Oil Repellent spray. Similar products can usually be bought at any good shoe retailer or boot-maker. This helps to keep dirt and grime to a minimum as well as waterproofing the footwear. Be aware though, that once your footwear get wet, you need to apply another coat after they have dried.
Secondly, you can wash your double faced sheepskin footwear – but do it carefully. But first, what is double faced sheepskin? It is proper, genuine sheepskin with the wool of the skin on one side and the skin on the other side. The wool is not laminated onto a leather. Just as you would do with a woollen jumper (wool pull-over sweater), hand wash in cold to luke warm water. NOT hot water. Use a “mild” wool detergent. We emphasise mild wool detergent because not all wool detergents are mild. Jumbo Ugg Boots sell one called UGG Sheepskin Double Face Shampoo. You might use an old toothbrush to help in the washing process. Once you have washed and rinsed the footwear, place them in your washing machine and put it on a spin cycle for a few minutes just to get rid of the excess water. You should then place the footwear in the shade outside to dry. If this is not possible, then put them inside to dry but AWAY from any direct heat such as a fire or heater. As with any wool product, any form of heat will “shrink” the shoes. No heat, no heat, no heat …..
You will notice once the footwear have dried that they have shrunk slightly but this is normal. After wearing them for an hour or so, they will go back to the normal, warm and comfortable state you are used to and at the same time, be clean.
Thirdly, if you find you have a grease stain on your sheepskin footwear, while they are dry, try rubbing some white chalk over the stain and leaving it for a few minutes. Then, using the bottom of your hand or your thumb, gently rub the stain. Repeat this a few times until the stain has disappeared. If a stain is being extremely stubborn try rubbing some fine sandpaper “lightly” over the stain. You have to be exceptionally careful with sandpaper as it is likely to take some of the dye away in the process.
Lastly, sometimes you can get what we call “spotting” where the footwear have come into contact with a few drops of water. You can usually eliminate this by folding the footwear onto itself, that is skin against skin, and gently rubbing it together.