I wonder if a cold snap following warmer weather is responsible for this excess misting.
I think it does as our MK3 starts to mist internally at the end of a sunny but cold day.
It was about - 2°C this morning, ice on the glass was sprayed, clearing the ice and I couldn't see any condensation. However, as soon in the car and switching on the engine the condensation set in...
Bizarrely, on the windscreen, it seems to set, like a film which a microfiber cloth works hards to remove and leaves streaks. I'm wondering if it's had some form of treatment added to the screen like an anti mist which is in fact causing issues.