Wolf has written
nitrogen would be a way, but if customer will open the housing everything is lost. We have made the experience that the procedure with drying seems to be the key. It's not sufficient to let Betty burn and heat without top only for some minutes, it's ness. to heat it up for at least 20 min. let it cool down till the housing is handwarm, close the top and moisture is history, 20 min. is minimum, an hour is also fine. It needs time to heat the LED housings ( this is the home of hidden moisture ) . Don't be afraid of overheating, Betty always detect temperature and regulate power.
If this is made properly issue is history. Greets Wolf
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