Lately, I've bought a large number of DVDs that have a cloudy or milky appearance on the disc surface. Most recently, the majority of discs from the Enterprise S1 set along with Season 1 of The Andy Griffith Show and Hogan's Heroes. There are no scratches or scuffs on these particular discs. All the discs are from Paramount and all have the 'Made in Mexico' sticker on them. Does anyone know if this issue is a problem or a sign of a disc defect that will eventually be a problem? The discs seem to play properly at the moment but I'm worried that the strange appearance could be a sign of a problem to come.