Hand sanitizer - Wikipedia- discuss what is meant by antiseptic hand wash ,Hand sanitizer is a liquid, gel, or foam generally used to decrease infectious agents on the hands. In most settings, such as the current COVID-19 pandemic, hand washing with soap and water is generally preferred. Hand sanitizer is less effective at killing certain kinds of germs, such as norovirus and Clostridium difficile and unlike soap and water, it cannot remove harmful chemicals.Hand sanitizer - WikipediaHand sanitizer is a liquid, gel, or foam generally used to decrease infectious agents on the hands. In most settings, such as the current COVID-19 pandemic, hand washing with soap and water is generally preferred. Hand sanitizer is less effective at killing certain kinds of germs, such as norovirus and Clostridium difficile and unlike soap and water, it cannot remove harmful chemicals.