Hand sanitizer is mainly used to wash your hands when warm water and soap are not available. You can also use hand sanitizer as an added layer of protection with soap and water. Hand sanitizers usually come in scented, unscented, liquid and gel forms. Scented hand sanitizer uses essentials oils to capture the unique scent. Unscented hand sanitizer smells mainly like alcohol. Gel Hand Sanitizer uses a chemical called carbomer in the mix to produce a gel like experience.