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This is really surprising for a brand new camera to frost so early. This usually occurs after a year or two. I have not needed to recharge the desiccant on the STL11k yet and it sits out in the observatory attached to the telescope 24/7 so it is subjected to varying temperatures. The fan is always on, but not actively cooled until I wish to use it.
I have heard of the ST series have problems like this, though few and far between. It was something to do with the sealing of the CCD chamber. I understand that your location is probably quite humid, however I still wouldn't consider this normal operation. As the others have said, recharge the dessicant again if you still don't have much luck. You should insert the plug no later than 20-30 mins after baking. Failure to do so can result in drawing too much moisture from the air. If you've still got problems after that, I'd be contacting SBIG. There isn't a camera manufacturer in the astro industry with better customer service than these guys.
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