Unless your car is really dirty from getting caught in the rain or traveling on an upaved road, no need to even get it wet. I have been using the following method for years without any problems with fellow Viper owners in the club always asking, how do I get my car so shiney? Assuming you have a good base wax/polish on the car, do the following:
1. Use a California Duster type mop to remove all of the top dust.
2. Use a good detailer spray (I use Mothers "Show Time". This step only needs to be done every 3-4 time.
3. Your done in half the time with a show quality shine.