According to the Centers for Disease Control and Prevention (CDC), hand washing is the "most important means of preventing the spread of infection." Here's how to wash them well and perhaps avoid a cold or the flu.
Turn on the sink and get your hands wet with warm water.
Use plenty of soap and rub hands together vigorously for at least 10 seconds.
Wash palms, backs of hands, wrists, fingers and under fingernails.
Rinse hands thoroughly with warm water.
Dry hands with a clean towel or paper towel.
Turn off the sink with the towel - this prevents reinfection of your hands.