Bacteria and mold can form in your fridge, making it smell, so be sure to regularly toss out-of-date items in the trash and thoroughly clean your refrigerator shelves. To clean your refrigerator, dilute a ½ cup of bleach per gallon of water or mix vinegar and water to lather on the surfaces and in the drawers — for stubborn stains, try using a Mr. Clean Magic Eraser.