Ok, I know I'm going to sound really dumb here lol. But toward the end of last summer I was eating chicken tenders and dipping them in ranch dressing, while driving through back country roads. I finished and didnt want the dressing sitting in my car, so I tossed it out the window. Well the wind hit it and splattered all over the side of my car. The sun then baked it on and after numerous car washes, its still there. I can take my finger nail and kinda scrape it off. Any ideas on how to get it off efficiently? Moral of the story, Dont Litter.