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.

Editors Note: As we note below, it’s still unknown whether or not UV Sanitizers and UV-C can kill Covid-19, and the FDA (Food and Drug Administration) recently released an advisory confirming this.