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Since I had the same problem (now I use one-way-nitril-gloves):
First, try using a clean micro-fiber cloth. If this doesn't do the job alone, there are special liquids for coated optics.
But always be careful and very gentle ;-)
Since I had the same problem (now I use one-way-nitril-gloves):
First, try using a clean micro-fiber cloth. If this doesn't do the job alone, there are special liquids for coated optics.
But always be careful and very gentle ;-)
Greetings
Katy