Skylights and condensation???
[This message has been edited by Matches (edited August 11, 2001).]
Perhaps there's stale warm, moist air in the ducts that occurs when the A/C is off. WHen it comes on, it 'mixes' w/the cool, dry vent. It's possible that there's an insulation problem if your ductwork is at the roof-line, or running up an outside wall that happens to get very warm.
Jay J -Moderator