If you are going to dry the car by hand using a towel, the first thing you must do is use a quality drying towel. Not that crappy stuff you buy over the counter that is made in China, a quality drying towel similar to the one
sold here. Also, you need to use the
pooling or sheeting rinse technique in order to dry most of the car with WATER.
Remember, the less you touch the paint, the better it is for the paint. That's why I use a leaf blower.