So I noticed a dark streak on the back my Aero Bronco A2 jacket the other day. It wasn't too noticeable so I left it cause i wasn't sure what caused it or what it was. It was about a half inch wide and 2 or 3 inches long. It was bugging me so zi got a cloth and rubbed it a bit and thought it was coming off but instead I just spread it more. I tried dishsoap and water but that didn't help. It must be grease and now I have a fckn dark blotch on the back of my new jacket. Wtf can I do about it? Can I get it off? I am pissed!