Clean the Sheepskin Boots

Handwash only. DO NOT use a washing machine. To clean your sheepskin boots, you'll need a mild sheepskin cleaner like Woolite or the Australia Sheepskin Cleaner, or you can also try using an all-natural cleaner which is safe for wool and other delicates. Be sure to dilute your cleaner in cold water according to the instructions - for Woolite, two tablespoons for every two cups of water; for Australia cleaner, mix it with water at a ratio of one to one, and for an all-natural cleaner like Ecover Delicate Wash, only a third of a capful with about 1/2 liters of cold water.
It is also said that you can even use a diluted mild shampoo. Be very careful here - you are not allowed to eliminate all the natural oil which is a part of your sheepskin boots.
Next, use a cloth soaked in cold water to dampen the outside surface of your boots, being careful not to thoroughly soak through the entire sheepskin. Apply a small amount of your cleaner to a sponge, and gently scrub the entire area in small circles. For tough stains or hard to reach nooks, try using a toothbrush - not to damage the material. Rinse off all the cleaner with your cold, wet cloth.

Dry the Sheepskin Boots

Stuff your sheepskin boots with recycled paper towels to allow your boots to keep their shapes, and leave them to dry in a clean, warm place and let them dry naturally for at least 24 hours. NEVER dry your sheepskin boots in direct heat or sunlight, which can cause the sheepskin to pucker or crack. Once the footwear is dry, lightly brush them with a very soft suede/nubuck brush in one direction only.

How to Deodorize Sheepskin boots?

Now, what if you got a bad case of the smelly dogs? Well, there are solutions here. Once your boots are dry, sprinkling a couple of tablespoons of baking soda inside then giving them a shake and letting them sit should kill any funky odors overnight. Be sure to gently brush the outsides of your boots with a suede brush to restore the pile, and you're good to go. These sheepskin boots can last nearly a lifetime.