Two other topics are closed, but I gather that Sugar Soap and elbow grease is the go, with a soft broom. @MikeB4 also mentioned carwash, and to rinse it off immediately. Im keen on Turtle Wax Carwash, its a great car cleaner, and if applied with very warm water, then left for a wee bit, the gently hosed off with cold water, it should leave a shiny wax coating? A) shinier, and B) easier for next time?