[APD] Deposit or Etching?

["Rachel Sandage" <rachelsor at hotmail_com>]

Wright Huntley wrote, in part,

"Please note that some deposits are not. The distilled water that can
condense on the cover glass and above the water line is highly solvent,
and can actually dissolve the glass, leaving a whitish etch that looks
just like a deposit. No acid will really cure that. [Hydrofluoric will
smooth it, but it is *really* unsafe to use. :-)]"

So what do I do now? I think that is what has happened on my top glass.

-Rachel

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