1, temperature: someone is wearing a diving watch sauna. The temperature in the sauna room is much higher than the normal outdoor temperature, and the instantaneous temperature difference will lead to premature aging of the waterproof gasket in the watch. Even a diving watch may lose its waterproof function before it is stipulated to replace the waterproof gasket. (Changchun Dumei after-sales service center: Room 09, Floor 8, Block A, Bank of China Building, No.727 Xi 'an Road, Chaoyang District, Changchun)

2. For watches that are not worn for a long time, wind them regularly once a month, so that the parts will not be in a static state for a long time, so as to ensure the running performance of the watch machine and the surface will be refurbished.

3. When wearing a watch, the sweat on your hands is corrosive to the watch case. Because the all-steel case is made of nickel-chromium alloy, it has better corrosion resistance. The semi-steel case is made of copper, which is easy to corrode when exposed to sweat for a long time. You should always wipe off sweat with a soft cloth or pad a plastic watch stand to prevent it from being eroded by sweat.

4. Surface renovation. After a lot of lines are scratched on the watch cover, you can drop a drop or two of water on the cover first, and then squeeze a little toothpaste to wipe it, so that the lines can be removed and the cover can be as new.