Originally posted by newarts: Before screwing a filter on, rub its threads in the groove where your nose meets your cheek; the waxy oil deposited will help when you later try to unscrew the filter.
Originally posted by magkelly And probably lead to fungus on the filter at some point too? If touching a lens or filter with your fingers can supposedly spread fungus than I would imagine this could too. Think about it. The nose area is always full of bacteria, fungus and goodness knows what else. The nose's job is to smell but also to filter the crap that goes into your lungs. Your nose and mouth area skin has countless bacteria and fungus spores on it all the time. I would not want that near anything that could go on a lens, seriously.
Good, quick, thinking, but I think you'll find that the fungi that inhabit one's face are not the same as those which love glass. Seriously.
I did not suggest rubbing a lens in one's nose. Rather I suggested touching filter threads beside one's nose.
Seriously,
Dave
PS billions of people-hours experience resting eyeglasses on their noses shows little risk of nose-glass fungus contamination. Perhaps there is a risk; if so, it is small.