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Old 19-11-2016, 11:18 AM
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Don Pensack
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Don Pensack is offline
 
Join Date: Aug 2006
Location: Los Angeles
Posts: 501
If the alcohol was pure and the cotton balls didn't have lanolin added, then whatever was on the eyepiece was partially put into solution and smeared around the lens.
It wouldn't be odd to have to clean something 3 or 4 times to get rid of all the residue.
I could regale you with stories about mascara and acidic fingerprints!
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