Now that we are starting to have colder weather, I've noticed that upon start up the car's windshield quickly develops condensation on the inside. While sitting still, the defroster does not effectively clear the condensation. While driving, the condensation does lessen. I have also smelled a very slight anti-freeze smell. Does this indicate that the car has a problem with a leak in the heater core? Also, I noticed while on a trip in Florida that with the A/C on, water vapor forms and comes out through the dash vents. Normal?

Fortunately, the car is still under warranty. Any opinions to best course of action?

Thanks!

Kenneth