That is a great question about hand sanitizer.
Hand sanitizer contains a high percentage of
alcohol, which kills bacteria cells. It kills
them by destroying their cell membranes and the
proteins inside the cells. Luckily, the alcohol
does not destroy human skin cells. A negative
effect for people is that it can lead to dry skin,
so hand sanitizers usually contain a moisturizer
along with the alcohol. While hand sanitizer can
kill bacteria, it cant remove dirt, which is why
hand sanitizer shouldnt be used as a substitute
for hand washing.Thanks for your question!