Noticed these spots on the screen of my 12" MacBook today, no idea how long they've been there (had the MacBook since September last year). They almost look like watermarks but seem to be in perfectly straight lines (possibly from the keyboard? as the one horizontal mark lines up perfectly with the raised edge of the keyboard). I have not spilt any water on it and have tried cleaning them off but they won't budge. I can only see them when the screen is off but have a feeling it will start getting on my nerves! Is this something worth contacting apple for? (is it likely something they'll fix?) A bit late now but in future perhaps I'll start placing some foam or the screen cover that came with it between the screen and keyboard. Below are some images, the best I could get. Thanks Dave EDIT: They're not the best pictures but you can see the vertical lines/dots then one long horizontal line around the middle of the picture.