Why should the watch take over and wash the watch every time plus an oil

Why do you want to take apart and wash the watch refueling: Watch in use, because the drop on the mechanical parts of the lubricating oil will be a long time will evaporate dry; mutual friction of gears will produce some metal fines, increasing rotational resistance; dust, fiber, etc. from the case of the gap Invade, is the machine fouling. Therefore, after the watch is used for a period of time, it needs to be disassembled and refueled. How often should the watch add oil? Watch how often you add oil, can not be generalized, which is directly related to the degree of sealing the case . Waterproof watch case seal is good, dust is not easy to invade the movement, demolition and refueling time can be separated by a long time; no waterproof structure of the case sealed generally poor, dirt, dirt easily invaded from the table gap movement , washable Come on time will be separated by a short time. Some people say that the watch should be fixed one year or two demolition and refueling time, this argument is unscientific. Watch the use of the process, only to find that more and more slowly or winding foot winding go less and less time, it is necessary to demolition and refueling. If the normal movement of the watch for about four years without demolition and refueling, the best demolition and refueling once. Because the machine is still normal to go, but when the lubricant volatilized to dry, and then continue to move, easy to wear parts, and then wait until the machine is not normal before going to demolition and refueling, some of the parts will be some damage or increase repair difficult.