condensation under crystal

[rattandsonwatchmakers]

here is my dilemma is this....two watches have come to me with foggy crystals....water tested...no problem...gaskets changed...it has been very very hot and humid here....how can i explain to them the reason of the foggy nature of the crystal...thanks....

[szbalogh]

It is easy to understand humidity by thinking for example on sugar solution. In hot water, You can dissolve more sugar than in cold water. By closing a watch You add fixed amount of water "dissolved" in the air. Night is coming and it is getting colder. Now the "solution" getting concentrated and saturated. The amount of water that cant be dissolved will condensate. Why on the crystal? Becouse tha bottom of the watch is warmer on the wrist and at the crystal is the coldest. 

Solution? Put the watch and caseback separated in the fridge . Leave it there until getting cold. Quickly put the caseback on the case while in the fridge. This way You get less total amount water in the watch. Or You can simply put the watch (caseback off) in a nylon bag with dried silica and close the bag. Leave there for a day. Then while in the bag quickly put the caseback on. 

[rattandsonwatchmakers]

that is fantastic...thank you so much....that is a great explanation and solution...thanks again