There are a lot of things we think we know about those germs all around us, but only some of that stuff is true.
We've got a handy crash course in hygiene fact and fiction for you.
Mental Floss made this entertaining video that somehow still manages to clear up misconceptions about staying clean and germ-free. Scroll down if you want to get right to it.
2. Soap kills germs. (0:48)
Soap doesn't actually kill anything. It just makes germs slide off your hands when you rinse them in clean water.