He Uses 2 Sharpies To Colour Over His Smartphone’s Flash. The Reason? I CAN’T Believe This Works!

There’s an app for everything, they say… but is there? Is there really!? Some things, you just can’t do with an app. But that didn’t stop one ridiculously clever YouTuber from turning his smart phone into a black light! “Black light? Why do I need a black light?” Well, black lights can actually be incredibly useful for seeing nasties that are otherwise invisible to our eyes. For example, just how clean is your hotel room? What kind of gross things can be found on your airplane seat tray? I shudder the thought… but I’m also incredibly curious. [googlead]Anyway, this hack is ridiculously easy so give it a shot. I don’t blame you if you end up going on a serious cleaning spree afterwards…