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Originally Posted by CoombellKid
there is one thing I never do that I have seen folks do and was shown in
the recent mirror cleaning article in AS&T and that is lay the mirror flat and
blast water at it, I always palce mine at an angle that way I'm not blasting
water down directly onto grit more blowing it side ways.
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That's a good point, Rob.
I've often considered the potential for pitting or scratching a mirror's surface from directing a blast of water directly at dust and grit gathered on its surface.
Better, as you say, to direct water at an angle and maybe increase water speed a little to see if it moves the worst of the gunk.