Reddit reviews Prestone Windshield De-Icer, 11 oz

Kinda like this:

http://www.amazon.com/Prestone-Windshield-De-Icer-11-Oz/dp/B000R2Z9E8/ref=sr_1_2?ie=UTF8&qid=1420046953&sr=8-2&keywords=de-icer+scraper

1 can of de-icer goes a long way! It melts snow and ice instantly even on those pesky -30 degree days. Example

Source: I live in Wisconsin

If you want to use your windshield wipers to get rid of the frost.

If you want to manually get rid of the frost.

Both will pretty much instantly melt anything except a large build up of ice.

Hmm. I haven't tried this but it seems like the next step: http://www.amazon.com/Fram-Group-AS-242-De-Icer-Treatment/dp/B000R2Z9E8

I'll emphasis the claim that it helps reduce re-freeze. But if it refreezes, perhaps another spray will do.

This situation is a pain in the ass but I think it's worth it to not have a full door frame. Opening my door with the window down in the summer makes me feel like a cool guy.