Step 1 - You need to very lightly dampen the outside of the uggs clearance with some cold water. It is important that at no stage do you fully immerse them in water. Immersing them in water not only affects the lining of the boot inside but will also cause the boot to become misshaped.
Step 2 - At this stage you need to mix 1 part cleaning solution (suitable for cleaning leather) with 1 part water and again taking a sponge you dip it into this solution and then wipe this over the outside of the boot.
Step 3 - As you apply the diluted cleaning solution you should rub the sponge gently over the boots and then rinse this off with another sponge that has been put in clean cold water