Every morning when I drive to work, the windscreen is fogging up on the outside. I turn on the heater so it blows warm air on the windscreen until eventually the fog disappears.
When I'm driving (35 mph / 50 km/h) the entire windscreen fogs up in about 2 seconds, so I must use the windscreen wipers so I can see. When standing still (at a traffic light), the windscreen fogs up much slower (about 30 seconds)
There is only a tiny leak in the trunk of the car. The carpet is a tiny bit moist. Can this cause this behaviour? Also I have a moisture absorber in the car.
Why is it fogging up from the outside and how do I prevent this?
Not sure if it's relevant, but the car is a 2004 Toyota Yaris hatchback.