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My home made genesis CCD isn't perfectly sealed and after about 2 months I need to recharge my desiccant. It is not the same as the SBIG but a similar scenario. After heating the desicant and resealing the camera I leave it for about an hour and can then turn it on with no frosting. The SBIG desiccant cannister is smaller than my sachets but I still think that it should take at the most only 2 hours to dry out enough now that you have fixed the leak (hopefully).
I can speed up the process if I purge the camera with dry gas. I use to use evaporating liquid nitrogen but don't have access to that anymore so I have to wait for the hour. Maybe this is an option for you?
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