I like buying previewed movies. I've stopped as of late because Blockbuster is selling them in some generic case and never includes inserts. I found a smaller chain that sells DVD's intact (albeit most in full screen) but they put a security/barcode sticker around the inner hole on the DVD. It only extends 1/2" from the center but does touch the disc art when said art goes all the way to the edge. So, will goo gone or something work on these? Will Goo Gone harm the disc in some way? thanks.