We are great fans of baking soda for its multiple uses. If you’re baking with baking soda, make sure it’s fresh. Here’s how you can test it.
Pour ¼ cup of distilled white vinegar in a little bowl, then add 1 tablespoon of baking soda. If it fizzes, it’s fresh enough to use. If there is no reaction when the baking soda combines with the vinegar, forget it. Just pour the box down the drain. Stale or not, baking soda will freshen your sink.