I live in a townhouse in upstate NY and since I bought my home, almost 20 years ago, during the winter months I get condensation on my skylight window. Sometime, when cooking or if I have the humidifier too high, condensation will form on the glass and drip down the inside of the skylight wall-Img1. Img2 is how it is located...above the front door-well sealed. There is a small like door on the top part of the skylight, Img4, but I believe it is not suppose to be airtight but circulates air in the skylight space, maybe-don't believe it is blocked as long as I can see through the skylight? Any suggestion on how to keep the moisture from building up and dripping down the wall? Part 2 is on that same ceiling the skylight is on, and only in that area of the house I get shadows of the studs-Img4...this year it has been the most prominent. I have been away from home for the better part of the winter with the thermostat down to about 55 degrees. Any suggestion on why that is happening? Thanks to all who have any suggestions.