One would think that a watch owner who just spent $6,000 on a Rolex Submariner would at least make a modest effort to keep his valuable and fine timepiece in decent condition. Unfortunately, some watch owners could not care less.
Here are a couple of photos of a Rolex Submariner that came in for overhaul.
The amount of dirt and filth built underneath the clasp is just unbelievable. Not only that sand and dust will eat away the metal links in no time, especially when the bracelet is worn loose (embedded particles of sand act like grinding paste), but such filth (and I really don't have a better word to describe it) can cause a serious health problem.
All this can be avoided with just a bit of common sense. A stainless steel bracelet of a waterproof watch should be cleaned regularly. A toothbrush and soapy water (e.g. dishwashing detergent) will do a marvelous job.