How can baking soda be used to remove the odor in old tennis shoes?

Baking soda can be used to remove odors from old tennis shoes by sprinkling a generous amount inside each shoe and letting it sit overnight. The baking soda absorbs moisture and neutralizes odors. For best results, you can shake out the excess baking soda the next day and, if needed, repeat the process. This simple and natural method effectively freshens up the shoes without harsh chemicals.