On My 2010 13" Unibody MacBook Pro, over the years, a shadow has appeared on the LCD. It looks like slight greyish clouding, and the interesting part is that the shadow is exactly in the shape of the Apple logo, which is of course on the other side of the display cover. I can't understand how this has occurred. It's like something is between the backlight and the LCD, perhaps dust. It is slowly getting more noticeable. On the topic of dust, I've seen some similar clouding in an iMac with accompanying solutions. However, in that situation, he was able to separate the diffusor and LCD. I don't see how that is possible on the MacBook Pro LCD. Has anyone had this happen and resolved it?