First, I'll confess I don't wash my cars that often. Ever since I was a little kid when I washed my parents' cars, I have simply used a little bit (maybe a 1/2 cup) of liquid laundry detergent in a 3-5 gallon bucket filled with water to use as soap suds. After a solid scrubbing with a sponge, the car gets well hosed off with a garden hose making sure no soap is left on the car. Now that I see all these car wash formulas in the car care aisle, I have to wonder if I'm doing something wrong or are those products simply designed to separate me from my $$$. Any thoughts or alternatives welcome.