If your looking for a good high quality glass cleaner that works, try "Aristowax Invisible Windows Crystal Clear" i found a bottle in a discount shop for £2 and its the best glass cleaner I've ever used for pulling road film and water stains from car windows and its safe to use on the font screen, absolute bargain! Even white vinegar wouldn't shift some of the film on my glass, this stuff did. Bargain. Did I mention at £2 its a bargain??