Women's Ugg Tall Boots-Size 7 (Need love)

Womens tall Ugg boot size 7 Tan color little nick at top of one boot These boots need a good clean that I can not figure out how to do the inside is like new condition my daughter wore these twice and we did not put protectant on them and the first time in the snow, they looked like this I'm sure there is a product out there that can get them clean Only worn twice!