Hand-washing seems pretty simple, but a recent study shows that 97% of the time, we're still doing it wrong, which can lead to contamination of food and surfaces and result in food-borne illness. The study from the US Department of Agriculture shows most consumers failed to wash their hands and rub with soap for 20 seconds. That's the amount of time recommended by the Centers for Disease Control and Prevention, which says that washing for shorter periods means fewer germs are removed. How do you know you've washed thoroughly enough to prevent spreading germs and bacteria? While washing, sing the alphabet song once through before stopping. Include washing the backs of your hands and under your fingernails. Dry them with a clean towel and you're on your way to a healthier day.