Bread

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The Lunchtime Staple
Storing sandwich bread in the fridge—whether or not it's been presliced—is the fastest way to make it turn brittle, because staling happens most rapidly at temps just above freezing (aka your 40-degree locker). You'll have better luck with an intact loaf, but either way, keep bread at room temperature or freeze it (for the best texture, let it thaw at room temperature, not in the microwave).