How dirty is your car when it only takes you 20 minutes to do a wash? I got some Optimum No Rinse a while back to see if I could cut down on wash time, but I was scared of scratching the paint so I made sure it got really wet, but then I had to spend much longer than 20 minutes (can't remember how long) doing that and drying it. Maybe if the car had just a light dusting after driving for a few days in no rain? My problem is I always wait too long or after it's rained, and by then the car is too dirty and it scares me to only wash with the No Rinse.