You can not completely dry a car/bike/boat etc with air. I have been using air to help with the drying for 35 years now, nothing new and does not require a Metro type blaster, althought they are a good product, but If you have filtered air that you are comfortable with using to paint your car, you can dry with it as well. But air alone WILL leave dry spots, blow off the excess and use a Microfiber waffle weave towel that is designed for drying, with a hemmed or silk banded edge. Autogeek has some wonderful products just for drying. They will not scratch, if kept clean and used correctly.
Also, I recently broke down an bought a pint of Chemical Guys micro fiber wash. I have been using premium car wash soap for years but had difficulty getting a complete rinse and resulting in occassional streaks on glass. The new soap has completely eliminated this problem. The towels/rags look brighter, absorb better and do not leave any streaks even on glass.
Good stuff, $11.00 from Amazon.