Usually by the time it gets that cold there is no ice problem, even on the windscreen. I was surprised to see ice form. I have flown airplanes with heated windscreens previously and they usually ice up, if at all, slowly and from the edges. These ones both seemed to ice up all over, real fast, even though they had heat applied from takeoff. I guess I had better stay above 20,000. I have had to land twin Cessnas at night with iced up windscreens and it is not fun; I expected more from this airplane. Hopefully if I need it the wipers will scrape them clean.
I am enjoying the airplane, it is nice to fly.
Thanks again for the info, it is appreciated.