Combine a cup of white vinegar and a cup of warm tap water in a bowl.
Dip a soft-bristle brush into the vinegar solution. Brush the solution across the aluminum dishwasher finish. Be sure to brush with the grain of the finish.
Dry the dishwasher off with a soft cloth.
Remove the dishwasher racks. Sprinkle baking soda across the inside of the dishwasher. Scrub the inside with a soft-bristle brush. This helps to remove any food or hard water stains.
Replace the racks. Place a cup of white vinegar in a dishwasher-safe cup and place it in the top rack. Run the dishwasher on a normal cycle. This will clean the inside of the dishwasher as well as remove any odors.