I have been having bathroom celing moisture problems in two bathrooms for the past couple months. The house was built in 2007 and we've lived there for almost a year before it started happening. We originally noticed it when after taking a shower each spot where a nail was just beneath the surface looked wet. A few minutes after the shower was turned off the spots dried up. It isn't a situation where moisture is coming from above as only the nail spots (I figure the coldest spots on the ceiling) are gathering moisture. I've checked the vents in both bathrooms and both seem to be working fine. The flaps open up on the outside of the house when the fans are turned on. I recently repaired a couple nail pops, primed (w/ Zinser 123 primer), and painted (w/ zinser perma white) the smallest bathroom to see if that would help. Now, this morning i noticed after taking a shower (no more than 5-8 minutes) that the whole cieling was wet (4 days after painting final coat). I can't figure out why this would happen and it is getting very frustrating. Before I primed and painted only the nail spots were gathering moisture...Any help would be greatly appreciated. Thanks!