Experts say that when you wash your face, you should always do it for at least 20 seconds to make sure the active ingredients can work their magic. The same applies to your handwashing technique, but he has a helpful tip: "Soap and water is best, but alcohol containing hand sanitisers are effective as well," Dr. Zeichner said. "Wash your hands while you sing the alphabet, like you did when you were in primary school. This ensures that you thoroughly wash the entire area. Apply a hand moisturiser after washing to minimise the risk of dryness or irritation."