Lemon is a good source for freshening microwave oven. After warming foods in the microwave-oven, the odour/ smell can be removed by heating halves of a lemon in the oven. This makes the oven smells fresh.
Step 1: Clean the microwave oven. Cut the lemon in half.
Step 2: Put the lemon in the microwave oven. You can put the lemons on a plate before you put them in the microwave oven because the juice of the lemon will drip on the microwave’s plate.
Step 3: Set the microwave to 1 minute 30 seconds and then heat.
Step 4: Close the oven door with the lemons in the microwave for some minutes before discarding the lemons( this enables the flavour of the lemon to fill the microwave oven. You can reheat the lemons in the microwave if you desire. You can also heat the lemons with some food.