I was wondering if we should clean and Lube the screw in crown from time to time?
Sometimes it looks a bit dark and I used a tissue paper to clean up some of the 'dirt'. The paper does show some dirt which I'm not sure if it's just small metal from the screwing in and out or a lube that is used.
I was wondering if I should put something like a grease (teflon grease or sillicon greas) or oil in the treads?
Any tips is appreciated to help make the watch last longer.
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