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Hi everyone, Quite some time ago (a good few years) I was wearing my Rolex datejust 1601 in London in heavy rain and high humidity (obviously a British summer). Anyway I noticed that quite a lot of condensation appeared in my watch. I know I know I should have taken it to an horologist straight away but alas. Anyway I pulled out the crown hoping it would allow the moisture to escape. This seems to have worked however the dial is now covered in watermarks which I can only assume are calcium deposits. I have seen a thread on the forums where someone removed a small watermark gently using purified distilled water. As you can see in the photo these marks cover the whole of the sunburst dial. Do you think this might be the best way? Or perhaps an incredibly gentle solvent? Naturally I want to be incredibly gentle, especially as I would have to go over the printed text and around the tritium. I have opened the watch up and taken a very tiny look at the movement and all seems fine - runs accurate and no sign of rust or displaced oils however do you think it's best just to send it in for a service and hope the watchmaker can fix the dial? Hold me and tell me everything will be okay.