Pour 1 cup of water into a microwave-safe bowl.
Add half cup of lemon juice to the water. Microwave the mixture on high for five minutes.
Leave the bowl in the microwave for 15 minutes to let the water cool. Wipe the inside of the microwave with a washcloth.
Leave the microwave door open to allow the air to escape. Microwave the lemon water two to three more times until you remove the odor completely.
Mix 1 qt. warm water, 2 tbsp. dish detergent and quarter cup chlorine bleach in a bowl.
Dampen a sponge in the solution and wipe down the interior of the microwave to clean it. Focus on all areas of the microwave including the bottom plate, gaskets and door.
Dry the microwave off with a towel.
Place an open box of baking soda inside the microwave
Close the microwave door and let the baking soda remain inside overnight.
Open the microwave to determine if the smell remains.
Mix half cup of baking soda with half cup of warm water to create a paste. Rub the paste over the interior of the microwave.
Leave the paste for 15 to 20 minutes, and then wipe it off with a damp washcloth. Dry the microwave with a towel afterward.