[ACBill]

Hmm..I do mine like Terry does. Hose and a bucket of (proper car wash) soapy water, and a sheep skin mitt.
You just have to do it very carefully to not get the interior to wet. If you do, a half hour out in the sun and it's dry again..
I usually only need to do this once or maybe twice a driving season. The rest of the time a California car duster keeps it looking good.