Method 1:

1. First pour 2 cups of water into a bowl and add half a cup of white vinegar to the water. The optimal ratio of water to vinegar is 4:1.

2. Put the bowl in the microwave and heat it on high heat for five minutes. The heating time must be sufficient, mainly to allow the grease to fully melt and blend with the white vinegar.

3. Open the microwave oven and let the heat dissipate for a while to avoid being burned by the heat. Then take out the bowl. At this time, you will find that the stains in the microwave oven have been somewhat dissolved.

4. Wipe gently with a rag.

Method 2:

1. Pour baking soda and water into a bowl, the ratio of the two is 3:1 or 2:1, and stir evenly.

2. Apply the paste to the inside of the microwave oven, covering all dirty areas to avoid smearing the paste on the heating element.

3. Close the oven door and let it sit for more than 12 hours. The oil will become loose after absorbing the baking soda paste.

4. Use a damp sponge or scouring pad to wipe off the baking soda paste.

5. Finally, wipe away the excess stain with a wet towel until no trace of baking soda is visible anymore.