When a cars windows are coated in frost, there is this weird phenomenon where you can place your hand on the opposite side (side without frost), leave it for a few seconds, and when you take your hand away you can slowly watch the ice melt. It’s hard to explain, but I hope someone knows what I’m talking about. I used to think it was something to do with the sunlight reflecting off my palm, but I was doing it last night
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Your hand warms the glass on your side. The heat takes a bit of time to travel through the glass, so even though you’ve pulled your hand away, the heat from the initial hold time is still moving through. So long as it’s not too cold out, that heat will be enough to warm the exterior glass to a high enough temperature to melt the ice.
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