Ok I have a Dell Latitude laptop and it has 3 spots on the screen. One of them is about the size of a pencil eraser and seems to come from the IBM eraser-heas style mouse. They don't seem to be on the surface beecause the screen is super smooth and clean, and the image shows up just fine behind them. I've tried to clean them without sucess. I'm just confused about what they are or what caused them to appear.
Here is the biggest spot. They are not easy to photograph.
Any suggestions?