Screen Stains that won't go away
My flatmate used my new MBP 15" Retina today, got finger stains on it and then went to clean it. They say just with tap water, but there are stains all over the screen like a smudgy mist that won't come off - i think they used some kind of washing up liquid or soap.
I've tried a micro fibre cloth, and special bought lcd cleaner, but its not worked, the smudges are all there still.
What is the best way to get rid of them if it is caused by some kind of soap? OR am i looking a paying for a costly replacement?