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.
Misconception #1: The five-second rule (0:16)
Sadly, not true. The little buggers start climbing on your food right away. Sigh.