Does anyone have experience and recommendations for a product that removes scratches from DVDs? Just for the backstory, my own DVDs are in pristine shape but I am very frustrated with the discs I receive from Netflix. A quarter of my rentals skip or freeze. Netflix's return-and-resend policy takes too long so I would like to solve the problem without having to wait for another copy of the movie. I see a lot of scratch removal products out there and would like some feedback on ones that seem to work well. Any suggestions?