Did you know that baking soda can expire? One way to test it is to simply spoon a little bit into a glass filled with white vinegar. If it fizzes, it's still active. If not, it's dead. But there's no need to toss it into the trash. There are lots of uses for baking soda around the house. You can use it as an all-natural abrasive on tough-to-clean areas like a stovetop. But one tip that's key for pet owners? Use it to neutralize accidents. If your dog or cat accidentally relieves itself on your hardwood floor, wipe up the urine, then sprinkle baking soda on top. It will absorb it and neutralize the acidity to prevent damage to your floors.