UGG PROBLEMMM!!!!!! AHHHHH!!!!!!!?

i was in school, and some freaking girl was walking in the cafeteria. then another girl pushed her and her freeeeakkkkkinggg tray fell on the floor. the open packet of ketchup squirted on my black UGGS! ughhhhh! i was aboutt to like freakin, kill her. lol. so yeah. i tried to clean em with the thing tht they gave in the store and some water but now theres a SLIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII… discoloration on that area, its barely there but i see it and it bothers me. (btw, these are new uggs, got em last night, and theyre my first ones...yeah. just my luck!) ugh, someone please help. make this go away! lol. im about to cry you guys. how do you fix thiss???