Windshield fog

[Danno25]

This has happened more than once on my 2020 LT.
It wasn't even raining out and I actually had all three levels blowing warm air and about 20 minutes into the drive the windshield fogged up to the point that you could not see.
I shut down the foot and chest levels and cranked the defrost but it took quite some time to clear.
I have never had a vehicle that did this.
Am I to expect this or is this some defect?

 

[Moonwink]

Check the radiator coolant level and make sure your heater core isn't leaking. That could cause the windshield to fog.

 

[Danno25]

The level has been at the fill line since I got the car... 43,000 miles currently.