To start, fill a microwave-safe bowl with 1 cup of water. Then mix in 1 to 2 tablespoons of baking soda. Place the bowl in the microwave and set the timer for five minutes on high heat. The baking soda/water combination will start to eliminate odors and steam off the stains.
How do you get yellow stains out of microwave?
Severely burned food, such as popcorn, can cause a yellow stain, Wood said. GE recommends placing a glass bowl with a cup of water and a tablespoon of lemon juice in the microwave and heating it until it is steaming. This should help loosen whatever is on the oven's interior.