Q: What should I do if the windshield becomes foggy?
If the crystal becomes cloudy, it means that the watch is not completely waterproof. If you leave the watch like this for a long period of time, the inside will rust and in the worst case scenario, it will become irreparable.
A: If you notice any fogging on the crystal, pull out the crown and store the watch with the crown facing up.
One way to remove moisture is to place the watch with the crown pulled out in a sealed case and enclose silica gel inside, but in theory silica gel will absorb oil, so it is best not to use it unless moisture or water has gotten inside the watch.
Once the windshield is no longer foggy, bring it in for maintenance service immediately.
Some people think it's okay because it's gone, but the moisture never goes away completely and can damage your watch in the long run.
In most cases where the crystal of a current watch becomes cloudy, it is due to a problem with the way the watch is being used. Make sure to push the crown in properly, and if you feel resistance, do not force it in; instead, remove any debris and then screw it in again.
That should keep it waterproof.
