[mustardjohn]

After you wash you can also use a pump hand sprayer and spraty down the car with distilled water. Mr. Clean makes an ion exchange system that takes out the salts that cause water spots. You hook it up to your hose afor the final rinse. I think a hand sprayer and distilled water is cheaper.

And as said above a good waffle weave MF towel or two used to dry after the wash works well and is lint free. That is what I use.
The micro fiber towels are the best thing you can ever buy for detailing cars. There are some previous posts on this site about them.