Using Aerospace Protectorant 303 on fiberglass, black nose E250 grillethen wiped some onside windows treated with RainEx: transparent. Traveling thru MT,WY,ND,SD.and ID during this wet spring,went to wiping wiper blades with 303 and leaving a wide streak from the paper towel damp with 303 under the blade at rest area. Wiped side windows at bottom gasket. On cleaned window glass off course. Works perfect. Saw muh first moose !