Hand Sanitizer is a product used on your hands to kill germs, bacteria and virus that you may have come in contact with in your daily routine. They generally come in easy to use applicators that spray or squirt a sanitizing gel or liquid that sufficiently covers your hands killing off the germs. Additionally it is meant to evaporate quickly where there is no need for a cloth or towel to dry your hands. They come in both Gel and Liquid forms with varying ingredients but the main active ingredient is alcohol. Depending on the type of alcohol, the smell can vary greatly.