Long ago I heard, directly from GE engineers who got involved, that someone used a GE steam iron to defrost a windshield. They modified the design to make such misuse (among other stories they knew) more difficult.
A long time ago during a bitter cold snap one of my friends wife defrosted the windshield with a propane torch. She was in a hurry.
The end result was not pretty and resulted in a new windshield and trim. The plastic cowl got melted a bit in one spot but that was left as a daily reminder for her.