I'm an avid fan of the I Love Lucy series and up until recently, I have been able to play every single disk that I have. Last summer, I started having problems playing certain episodes on one or two disks. I looked on the back and there seems to be some sort of...I guess it's sort of a discoloration. The color of the entire back of the disk is still grey, but there are portions of it that are lighter (sometimes very much lighter) than the rest of the disk. And it's not as though it's in a circle, the discoloration only happens in certain parts of the disk. Last night I was watching a completely different season and playing all of the episodes fine, this morning however, I could no longer play individual episodes. I'd like to know if there is any way I could fix these problems myself, or if I should just buy new copies of those seasons. Thanks in advance.