Wet ceiling arond AC ' ducts
I live in south Florida and run my AC pretty much year round and have a question about the ceiling AC ducts. All my ceilings around the ducts are wet to the point the paint has bubbled a bit. There is no dripping but the ceiling drywall is quite damp when I removed it. It is only around the vent. the AC ducts themselves are square where they feed the rooms and seem to be made of metal foil wrapped fiberglass board (I apologize for not knowing the correct terminology).
My thoughts are the metal 'louvered vents' that attach to the ducts may be getting condensation that is then absorbed by the drywall. Does this make sense and how can I stop it?
Thanks in advance.