1. Unplug the refrigerator and remove all the contents from inside. 2. Mix a solution of equal parts water and vinegar in a spray bottle. You can also use a mild dish soap mixed with warm water. 3. Spray the solution onto the interior surfaces of the refrigerator, including shelves, drawers, and walls. Let it sit for a few minutes to loosen any grime or spills. 4. Use a sponge or microfiber cloth to wipe down the surfaces, paying extra attention to any stubborn stains or spills. For tough stains, you can use a paste made of baking soda and water or a non-abrasive cleaner. 5. Remove the shelves and drawers from the refrigerator and wash them in the sink with warm soapy water. Dry them thoroughly before placing them back in the refrigerator.