So long story short, I have finally figured out that I killed all my diapers by using soap and vinegar at the same time in the wash. For years. And stripping so far has not helped them stop leaking. Some I'm boiling them now. Like, right now. We have a crazy assortment of diapers, many rather older, because most of them were hand-me-downs and... it has just occurred to me while stirring them that maybe some of those covers with the plasticy feeling lining should not actually be boiling? 
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If anyone can answer me this with a quickness I would really appreciate it, right now I'm just keeping an eye on them to see if they start to look like melty doom.
Well, I've done it... I guess I won't do it again.
