
According to the Mayo Clinic the following is the correct way to wash your hands:
Proper hand washing with soap and water
Follow these instructions for washing with soap and water:
* Wet your hands with warm, running water and apply liquid soap or use clean bar soap. Lather well.
* Rub your hands vigorously together for at least 15 to 20 seconds.
* Scrub all surfaces, including the backs of your hands, wrists, between your fingers and under your fingernails.
* Rinse well.
* Dry your hands with a clean or disposable towel.
* Use a towel to turn off the faucet.
That last step is especially important
when using a public sink.