Baking soda fixes stinky lunch boxes

Baking soda is the fastest fix for an onion or garlic smell in a stainless steel lunch box.

Onion and garlic leave behind sulfur compounds that cling to the metal like stubborn oil. Regular dish soap lifts the grease but leaves enough of those molecules behind that your next meal tastes weird. Stainless steel is also microscopically porous, so the smell gets a grip.

Mix a thick paste of baking soda and water — roughly one to one — and scrub it over the whole inside with a soft sponge. Let it sit for ten to fifteen minutes, then rinse and air dry. If the smell is really baked in, follow with a splash of white vinegar; the fizz helps lift the residue. Just don’t seal the lid while it’s reacting, and rinse after.

Two slower fixes that also work: leave the open box in direct sunlight for an afternoon, since UV light breaks down those sulfur molecules. Or rub the inside with a cut lemon or tomato — the acid neutralizes the odor.

And going forward, don’t snap the lid shut the second you finish eating. A quick rinse and letting it dry with the top off does more than any cleaner.

Future sandwiches will thank you.