If you you've got the ice forming after you get home and the windows are closed, you've got moisture problems IN the car. The floor mats are sopping wet or there is a puddle somewhere inside that is raising the inside humidity up high and then at night it frosts on the inside, the same process that causes frost on the outside on cold nights. Condensation forming and then temps dropping.
Find the wet spot / spots and fix them. Leaky windshield? wet floor mats / carpet, bad heater core or bad heater connection, plugged AC condensation drain hose, whatever.
Best of luck. In the olden days, we'd keep a credit type card in the car to scrape the inside window while driving. That was in my old car without air conditioner
You can't use the recirc setting when on defrost or foot/defrost. Older Vibes might be able to and I've learned from past autos that any setting with cold/rain and recirc = fog!
Oh yeah, don't breath too hard on the windshield...
Also dirt and airborne road grime built up on the inside of the glass surfaces can also attract any moisture in the air.
Fully Loaded 2009 Black Vibe 1SC with 2.4 Litre Manual Tranny
Check her out at My Cardomain page link below:
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