When to use hand sanitizer
When soap and clean, running water aren’t available, use an alcohol-based hand sanitizer that contains at least 60% alcohol. Hand sanitizer quickly reduces the number of microbes on hands in some situations, but does not eliminate all types of germs.
To use, simply apply the product to the palm of one hand, and rub your hands together, spreading the sanitizer to all the surfaces of your hands, until they're dry.