ELI5: Why does air make snacks go stale, but the air in the package before it's open doesn't?
Basically the title. If you keep a sealed bag of chips for months, when you open it the chips will still have a crisp texture despite the bag being filled with air. But if you open a bag of chips, in less time, the chips go stale. What's the difference?
Moisture in the air outside the bag? Something else? #education