How to remove bad odor from oven?

Some times cooking odor (non-veg dishes, garlic etc.) may retain in the microwave oven. 
To remove this bad odor:

• Put water (3/4 of bowl) in micro proof bowl. 
• Add peel and juice of ½ lemon and 2-3 cloves. Microwave for 3-4 minutes. 
• Allow to set in microwave oven for over night or 5-6 hours. 
• The bad odor will totally gone. Wipe interior of oven with soft cloth.