We have a new 2008 Dodge Grandcaravan SXT and the windows fog up constantly. Not just the front but All of them...it gets to the point you can not see and the defrost does little to no good.

is this common? Any ideas what could be the cause?

thanks

 

Are your heater controls set to fresh air or recirculate?
They should be on fresh air to keep the humidity down.
Heater output suffers though...

 

I keep mine set to the windshield setting only...if I set to vents, floor + vents, floor, or floor + windshield, I will also get foggy windows.

I can use fresh air or circulating.