Blowing into game cartridges never actually fixed them — here's what was really happening

If you owned a Nintendo Entertainment System, you probably remember this ritual by heart: cartridge in, blinking red light, cartridge out, lips to the slot, one hard exhale, cartridge back in, and the game boots. It was the kind of gaming wisdom passed down by older siblings and cousins because it appeared to work often enough to become unquestionable.

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