James Arbogast is a microbiologist with GOJO, the company that makes Purell hand sanitizers and dozens of other soap products.
He oversees a hand washing lab where they study what works and what doesn't.
"The biggest mistake most people make is doing it too fast. Some people here call that the 'splash and dash'" Arbogast says.
Click here to read more.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.