Clean the Uggs
The UGGs are hand wash only. DO NOT use a washing machine. To clean your Uggs, you'll need a mild sheepskin cleaner like Woolite or the UGG Autralia 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 use 2 tablespoons for every two cups of water, for UGG Australia cleaner mix at a ratio of one to one, and for an all natural cleaner like Ecover Delicate Wash, mix only a third of a capful with about 1/2 liters of cold water.

Some people say you can even use a diluted mild shampoo, just be very careful here - you are not allowed to eliminate all the natural oil which is part of your sheepskin boots. Oil in your hair: bad, oil on your UGGs: good.

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 - just be careful not to damage the material. Rinse off all the cleaner with your cold, wet cloth.

Dry the UGG Boots
Stuff your boots with recycled paper towels to allow your Uggs to keep their shape, and leave them to dry in a clean, warm place and let them dry naturally for at least 24 hours. Pay attention that 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 with a very soft suede/nubuck brush in one direction only.

How to Deodorize UGGs?
Now, what if you got a bad case of the ol' smelly dogs? Well, there's hope here, too. Once your boots are dry, sprinkling a couple 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 Uggs with a suede brush to restore the pile, and you're good to go. So just stay on top of 'em from here on out, and these boots can last nearly a lifetime.