I could never have imagined this in an 800 USD Master of G.
I have had the GPW-2000 for two years now... and I never let a single drop of water touch it (no shower, no swimming, no handwashing... I even kept it protected from rain!). I am an extremely careful guy with all my watches... usually, they remain in immaculate conditions for years.
That being said, today, for the first time, I had the TERRIBLE IDEA of washing my Gravitymaster.
I only put it under the water tap for 15-20 SECONDS while gently rubbing it with a soft-bristle toothbrush. Everything seemed ok and fine but... 3 HOURS LATER condensation behind glass appeared (please see the attached picture).
Please note that I double-checked the crown was 100% closed and screwed VERY TIGHTLY into the case before washing the watch.
When seeing the condensation, I put the watch under a hairdryer (cold hair) for 20 minutes. The condensation disappeared but, 10 minutes later, it appeared again. Then I put again the watch under the hairdryer and sealed the watch in a little plastic bag filled with 2 unopened packets of silica gel desiccant. After 1 hour the condensation disappeared again, and I decided to keep the watch in the plastic bag for at least 12 hours...
Any ideas what has caused the condensation to get inside? Could it be the result of the temperature of the water? (it was straight hot water)
What else can I do in order to keep safe the watch movement, GPS antenna, etc?
And, above all, will the watch be fine?
Thank you in advance for your previous advice.