I'm new here and am a new owner of a 2006 convertible. Had our first warm day since buying the vehicle and turned the heat on. Windshield fogged up bad with a nasty kind of glaze. Made me think the heater core is bad, but I've got no coolant on the floor. The heat is also pumping just fine. Smells bad like coolant in the car only when the heat is on. Anyone seen this same situation before and able to lend some advice. Thanks in advance.