Washing hands with soap and water is the best way to reduce the number of microbes on them in most situations. If soap and water are not available, use an alcohol-based hand sanitizer that contains at least 60% alcohol. Alcohol-based hand sanitizers can quickly reduce the nuymber of microbes on hands in some situations, but santizers do not eliminate all types of germs.
Hand sanitizers are not as effective when hands are visibly dirty or greasy.
How do you use hand sanitizers?