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Damp rid calcium chloride is "more suckie" than silica gel. Make sure the bag is absolutly airtight or you will try and dry up the planet. Then just use that scope on fine days as if it got in once...

Nikko sterling are actually very good for the money (cheap) the nighteaters especially so. Get one and you'll still have enough to buy a weeks worth of mince and instant noodles possibly two weeks.