You can't behind the screen, and it is a hair that got through the corners, happened to me, very strange, it gets under one of of the 9 layers. If you take apart the screen, you will completely destroy it. I had to bring it back and have them send it in, fix it for free of course. But they will just replace the screen and you will be good to go.
P.S. bring it right into a mac genius and as long as you have apple care or are still under warranty you will be set. Other wise your going to be paying another 700 bucks for the screen