Wow, interesting thread. I have one Simply Vinyl LP, ELO Out Of The Blue two record set. It came in a heavy plastic outer with a flap. I've only played it a handful of times since buying it sometime around 2001, and always stored it in the original outer sleeve. Anyway, I just pulled it out, and darn, it's got that crazy cloudy haze all over the vinyl surfaces. The records were not like that when new. And I had replaced the original inners and put the records in the same poly-lined inner sleeves I typically use. Those inners have not caused any other issues that I've been aware of. Cleaning on the VPI wouldn't remove the haze, but fortunately the records still play ok. So, it's the outer bag causing this reaction?