This may be slightly off topic, but it relates to water spots, so maybe slightly on-topic still...
Anyways, I saw
this video a while back and decided to give it a go. Washed the car, rinsed like I normally do and before drying I applied the wax as you dry, and wouldn't you know it, it worked great!
The water here in South Florida is ridiculous, and I
always had horrible water spots after drying the car.
I'll be doing this method from now on.. just thought I would share.
- Leo.