I'm pretty sure I read it on the forum here, but they were just soaking grungy clear in vinegar, preferably hot, to remove the scum from handling/manufacture/shipping. It worked better than rubbing alcohol or any other surface removal because it got down into the surface scratches. I think there was a DH glass that didn't like it, but for every other clear, go for it.
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ESC
Soft glass on a Minor/concentrator since 1996
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