I am sure this has been thoroughly explored in other threads previous to this one, but... Does clear vinyl ALWAYS yellow or discolor within a couple years? I just noticed that my skullpirate/captains are no longer truly clear... and they have been in the bag since I got them, when they originally shipped. I am wondering if this effect will continue... and they will go from a slightly yellow-orange tinted clear to a darker tint over time? (They were not exposed to sun or smoke and are in an air conditioned environment, not in an attic in Florida...) I have a clear Radd somewhere... I suppose I should check that one for reference.