S6 Edge Screen Burn - Anyone know how to fix?

Hi all. I have a problem with screen burn, and wondering if anyone knows how I can fix it?

Last night I fell asleep with Kik messenger open. Unfortunately, the screen stayed illuminated the whole time (was on charge) and now has screen burn consisting of what was open at the time. So, the Kik interface. It's driving me nuts. I've restarted several times, but it's still there.