Remove all the dishes from inside the dishwasher. Inspect the inside of the dishwasher for food, pieces of bone or grease. Remove the filter and clean it out because it may contain food debris. Wipe the base of the dishwasher out with paper towels.
Pour 2 cups of white distilled vinegar into the base of the dishwasher. Turn the dishwasher onto the low wash cycle and use the hottest water possible. Stop the dishwasher halfway through its cycle and allow the vinegar to sit for 20 minutes. Allow the dishwasher to complete its cycle.
Wipe the inside of the dishwasher down with a damp washcloth. Combine 1/4 cup of chlorine bleach with 2 tbsp. liquid dishwashing detergent and 1 qt. of water in a bucket. Wipe the inside of the dishwasher down with the solution.
Place a box of opened baking soda inside the appliance. Close the door securely and allow it to sit overnight. The baking soda will absorb any lingering odors inside the dishwasher.
Replace the dishes back into the appliance. Add a lemon-scented detergent to the dishwasher to make the appliance smell fresh again.