1. Lemon and water
Put the bowl of water and lemon/lemon juice in the microwave and run it until the water boils, about three to five minutes. “Let the steam do its job—don’t open the door for at least five minutes.
2. Vinegar and water
Take the microwave safe bowl or jug and add 500ml of water, followed by 2 tablespoons of white vinegar. Place the bowl or jug into the microwave. Then microwave on full power for 5 minutes, you will notice the liquid beginning to boil. Once the 5 minutes is up, leave the microwave door closed for around 3 minutes.
3. Baking soda
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