Hello,so this are my first pair of C&J and it's completely new,i ore it only 4-5 times but yesterday i did something stupid,i was out in the city when my friend called me and told he bought a new car and wanted to show me it,he came and it was an off-road car and he wanted to test it off roads so we went out of the city to test it in the snow...Long story short we got stuck in the snow and the way out was to dig the snow under the car and drive out,so i was digging snow with my bare hands in an undershirt (i took off my jacket in order not to spoil it) in minus degrees celsius,and i've got some snow on my boots which turned to water and here is the consequence of that...please tell me what can i do to clean it,it looks that the snow was mixed with the burned rubber from the tires so it went in the leather,here are some photos.