Many foods that you cook in the microwave create a very strong odor. That odor can last for a period of several hours or days. To remove the odor take a bowl and wet a paper towel and fold it in half and then in half again and put the towel in the bowl. Put the bowl in the microwave and heat the bowl and paper towel for one minute. Heating it will create steam and the paper towel will absorb the odor.