Like wearing in public and practicing , hand sanitizer is another way to avoid spreading germs when you're out and about and don't have access to water and soap (even if it's only a quick trip to the store). The Centers for Disease Control and Prevention the alcohol level in hand sanitizer to be at least 60% to effectively kill common germs and bacteria, but most brands tend to add a little extra for good measure.Still, if you think that all hand sanitizers are the same, think again.