im driving a 2006 Mack Granite. Thye got me this new tractor with the promise that i keep it clean on my own time. No problem there. The u joint thats near the back of the cab throws grease ALL over the back wall of the cab, and the back window. im making a guard so this wont happen again, but what in the world can i do about all the little spots of grease all over the cab? pressure washing didnt help much, i was also afraid i would start taking off paint. ive tried Fantastic, and Windex, and each spot was taking about 5 minutes to get it truly clean. this truck was painted to our color by the dealer, so im very concerned about taking off paint that isnt factory applied. any ideas????