2018 CC Bighorn. Shark fin antenna is on the driver side front of cab. Rear sliding window track drains are clear, no leaks from rear cab vents. Third brake light gasket has been replaced. On a daily basis I have condensation on the inside of my windshield. I have no water stains on any portion of the headliner, no wet carpeting, no leaks from any of the common leak points. I was convinced it was the shark fin so this past Saturday I spent a good portion of the afternoon pulling trim to drop the headliner. Removed the shark fin, cleaned the gasket with isopropyl alcohol, cleaned the cab mounting surface, replaced the small interior gasket that surrounds the opening to the roof and applied silicone caulk to the underside of the shark fin exterior gasket. I reassembled everything making sure the plastic spacer between the shark fin and body was placed correctly and the tension spreading spring was properly in place. I then applied a light bead of silicone caulk to the exterior gasket confident I conquered any leak. I did not check the truck yesterday but this morning I was dismayed that the entire front interior windshield was beaded with condensation. So much so that I used a squeegee to get the water off. Any ideas where this originates? Are there any other drains around the windshield frame? I do not have a sunroof and the only interior glass that is wet is the windshield.