1 Kill the mould: very dilute bleach, and this sort of stuff might be convenient. 2 Clean with shampoo and extreme gentleness. 3 Get it dry. No, really dry. Even drier. 4 Clean all the areas in the boot etc that it's been near. Although the spores are everywhere and just waiting for the right conditions I'd find it hard not to add this step. Do you need to do the outer surface as well? Jonathan