My parents sent up my monitor from home with someone, and I got it today. I gave it a good wipe down with a wet cloth cuz it was kinda dirty. Problem is, the screen colours are showing as 256 colors for images that have more, along with mainly the green pixel glittering (as if the pixel couldn't decide if it should stay on or off). The glittering only occurs in those places on the screen where the image is made of "true" (I think) colours. What could have happened to it? Is it fixable? Or something that will go away with time?