My GOD, Guys, get some detail spray involved to cut the hard water. Mist the car before blowing and then the hard water spots don't happen even with the 'drip down' that WILL occur. Turn your mirrors down to let it run out, lift the hood (either before or after the initial wipe ... both ways work almost as well), blow it all out including the wheels. THEN use the MF towels. Not just any towels from Pep Boys ... get some really good ones and keep turning or flipping as you dry. DON'T go NEAR the wheels, side panels or lower parts of the body with anything that you go back up on the car with.
It's not rocket science, it's just common sense. I have my Snake ready for the public in 45 minutes, start to finish. That isn't where I started ... the first hand wash took 3 hours!