One thing that drives me nuts about Blu-Rays is that for some reason the packaging methodology causes the outer cellophane-like wrap to stick to the spine of disc case, so when you take it off, there is a messy residue all along the spine which looks terrible, because the spine is the part you see when the case is sitting on a shelf.

To prove I am not making this up, there is a discussion thread on this exact problem in a different forum with some proposed remedies which I have found not to work very well.

My questions are: (1) why is this happening? and (2) how can I get the plastic residue off the spine of the case?