In my search for an answer to the cap jewel question below, I came across some very interesting videos. This is one of a 3 part series. Aside from the obvious cringe worthy things, it made me realize one major advantage of a microscope is that you are not breathing onto the movement as well as having lots of magnification. The point of cleaning is not to make parts nice and shiny, but to leave them chemically clean for the lubricants. His technique certainly eliminates the whole point of cleaning.