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Yes, it works and the best way I know how to clean EPs and other optical (glass) elements. It does leave a residue, but you would not see it normally. I can only see it on the projector lens when its being flooded with high intensity light from the lamp.
I've seen both Hurricane blowers and Lenspen around for much less than Bintel sell them for (close to 1/2 price). Sorry, I can't remember where, but it was an Oz astronomy shop.
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