Hand sanitizer works because of its high concentration of alcohol. Hand sanitizers work by stripping away the outer layer of oil on the skin. However, it is not suitable for cleaning all types of dirt or soil.
Alcohol kills most bacteria, and hand sanitizer contains a high amount of alcohol. When it is rubbed on the hands for about 30 seconds, it really will eliminate many forms of bacteria and also many viruses. A person who uses hand sanitizer is also likely to show slower redevelopment of bacteria. It may not be equally effective in preventing all germs. However it is not recommended as a substitute for washing with soap and water and not as effective.