Here are some hints for washing a vehicle in AZ. Do not wash your vehicle in the sun. Either just when the sun is gong down or first thing in the am. Do not use the "shower setting" on a hose nozzle. The droplets will cause water spots. Use the full flow setting and flood the vehicle. Wash a small area and dry immediately with a towel or chamois. I learned this from a fellow who lived in a hard water state. Works for me. I can hook up to our water softener and that helps but still will water spot unless I do as a above.
Moisheh
