eli5 how my hand can melt car window frost from the other side?

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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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