What precautions should be taken when using hand sanitizer?

Hand sanitizer is a kind of skin care cleanser used to clean the hands. It removes the dirt and attached bacteria on the hands through the action of mechanical friction and surfactants, with water flow or without water. ​1. Disposable hand sanitizer is only an emergency measure. If conditions permit, you should also wash your hands with water + hand sanitizer/soap. When there is dirt and other dirt on your hands, hand sanitizer alone cannot remove it. And both alcohol and non-alcohol hand sanitizers have limited sterilization ability, add chemical bactericides, or damage the skin. It is better to wash your hands with water, hand sanitizer and soap. 2. It is best not to dispense non-foaming hand sanitizers into foaming bottles. Packing non-foaming hand sanitizers into foaming bottles without adding water may cause the container to block, and adding water will dilute the concentration of preservatives in the hand sanitizer and make it deteriorate. 3. Wash your hands with running water and for a sufficient period of time, hand sanitizer and soap can achieve the best disease prevention effect. In fact, 'how to wash your hands' is the key to preventing diseases compared to 'what to wash your hands with'. The correct way to wash your hands should be: after rinsing your hands with running water, apply hand sanitizer or soap, rub your palms, backs of hands, between fingers, fingers, wrists and arms for at least 20 seconds, and then rinse with water.