Cleaning a microwave with baking soda is a simple and effective way to remove food spills, stains, and odors. Here’s how you do it. Mix 1/4 cup of baking soda with 1 cup of water in a microwave-safe bowl. Microwave on high for 5 minutes, then wipe down the interior with a damp cloth. Be sure to remove all of the baking soda paste. The steam from the baking soda solution will help soften any food or grease residue, making it easier to wipe away. Rinse the cloth or sponge and wipe the inside of the microwave again to remove any residue. Lastly, dry the inside of the microwave with a clean cloth, and you’re done! The baking soda acts as a mild abrasive and helps to break down and remove tough grime, while its deodorizing properties help to eliminate any lingering odors.