How to wash your hands - NHS
You should wash your hands for the amount of time it takes to sing "Happy Birthday" twice (around 20 seconds): 1. Wet your hands with water. 2. Apply enough soap to cover your hands. 3. Rub your hands together. 4. Use 1 hand to rub the back of the other hand and clean in between the fingers. Do the same with the other hand. 5.