I use Murphy's Oil Soap to wash my cars and RV. Nice smell and does a excellent job on cleaning and a nice shine. Use it to clean the awning also. Mix with water and spray on awning and then roll up, leave rolled up for hour or so and then un roll awning and rinse, does a excellent job of cleaning , if you don't get the results you want just make the mixture a little stronger. As for black streaks I pour a little bit straight on a rag and wipe on black streaks and wipe off. Murphy's Oil Soap is all natural and will not remove wax. It can be used on glass without leaving a oily residue or film.
2014 Cardinal 3450RL
2012 Ram 3500 DRW Quad Cab 4x4