Even the best things are inseparable from the maintenance, only long-term maintenance to reflect its value, do not think that spend a lot of money to buy the watch must be more durable than the cheaper watches, more on time, no maintenance, and some people are affordable Watches can not afford the money to maintain the watch, or fear of open the watch will leak, for fear of other people to steal parts, etc., these phenomena are we often face the problem customers often hear, it is not. First of all we watch from the structure, why watch need regular maintenance. First, the watch seal problem. Most watch are marked waterproof, such as 30M, 50M, 100M and so on. There are also some notices that are not waterproof. Due to the structural needs, some waterproof and not waterproof, not to mention non-defense