On a microbial level, your iPhone screen is probably dirtier than most toilet seats. Which is gross, to be sure, but most microbes aren't out to get you, so don't sweat what you can't see too much.

There’s a secret layer of protection on your iPhone or Android phone's screen that keeps fingerprints and smudges at bay. It’s called an oleophobic coating, and it’s something you probably won't think ...