How many people live in city's where the bylaws do not allow you to wash your car in your own driveway.
This effed up city of ours ie Toronto does not allow car wash water to be drained into the sewers.
Armour all concentrate car wash and Meguiars NXT 2.0. I've cleaned my car once a week and waxed it twice a month so I've never really had to use a clay bar to clean off any impurities in my clear coat. I'd recommend cleaning it as often as you can, it's easier to clean and easier to maintain than washing a very dirty car!