Do you dive your watch or use it in or near water.
Once fully unscrewed, does the crown pop out to the first stop, without being pulled, with ease. i.e. you here the tell tale click.
It might just be the time to have the crown seal changed.
It's a sign of very little, if any, contact between the O ring seal and the case tube.
Sorry but I don't offer a crystal/glass polishing service. Statistics state 1 in 4 people make up almost 1/3 of the world's population. For years now I have been trying to split an atom but I think I have the wrong TPI blade.