I bought the Criterion Collection Ghostbusters CAV set from someone on eBay. When I received it I started checking over the discs, around the edges of both there was some sticky stuff. This stuff didn't completely encircle the edges, but probably around 50% of the edges were covered. Please understand I am not talking about the edges of the playing surfaces, but the actual edges of the disc platters. Is this stuff the glue that holds the two disc halves together that is leaking or seeping out? Is this going to lead to laser rot? I don't have the player hooked up right now so I can't check for existing rot, but is laser rot visible just by looking at the disc, and if so, what does it look like? These discs do not appear to look any different from any of the other laserdiscs I've bought.