While staying at my grandparents’ house last weekend, I was craving pancakes—until I opened the baking cupboard and found a jar of baking soda with a label from the early 2000s. Could it still work?

Use the tongs to take each jar out, and let them cool on a dish towel. If they still have traces of the label or a sticky residue on the glass, rub those parts with baking soda — the glass should come ...

You may have used vinegar and baking soda before to make bubbles. In this experiment, we add a little dish detergent to make the bubbles last longer and see if you can use chemistry to control the ...