(1) The waterproof apron is easily degenerate and broken,so you should replace it on a regular basis,replace it before you repair it each time.
(2)If the glass is damaged,it will also affect the waterproof function of the watch,so you should replace it as soon as you find it is broken.
(3)Never operate the sterm when you are in the water or the watch is humid,so as to avoid the water goes into the watch.
(4)You should handle up the sterm after you use it,and the screw should be tightly locked in the watch,there should be no gap left.
(5) You should dry your watch whenever there is water on your watch.
(6)You should never let your watch contact with the chemicals,or it will affect the watchcase and waterproof apron,also it will reduce the water-proof performance.
(7)You should never put your watch in the environment where is high-temperature (+ 60 ?) and low temperature (-10 ?) for a long time.
(8) If you find there is some water aerosol inside your watch,you should clear it in time,so as to avoid rust of your watch.
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