I have try it. And that's why I ended up to search the air vents, and I did find them from the boot.    Old beetle didn't have any.

Surely it helps if you open the window slightly. No doubt.

I run my with the aircon button on all year round. I get some misting and on extremely cold days I get some icing inside but it clears fairly quickly.

Lots of posts about this most put some sort of absorbing bag in the car which helps.