How to Clean a Microwave and How Often You Should Do It

The fastest way to clean a microwave is to place a bowl of water with two tablespoons of white vinegar or half a lemon inside, run it on full power for 3 to 5 minutes until steam fogs the interior glass, then leave the door closed for two minutes before wiping the inside with a cloth. Steam loosens dried-on splatters so they wipe away easily with no scrubbing or abrasives. Wipe up any spill as soon as it happens, and run the steam method at least once a week for a deeper clean.

The quick answer

Place a bowl of water with white vinegar or lemon inside the microwave, run it on full power for 3 to 5 minutes, then leave the door closed for two minutes before wiping the inside with a cloth or soft sponge. Steam loosens stains without needing to scrub or use abrasives. Wipe up spills the moment they happen, and run the steam method at least once a week, more often with heavy daily use.

Key takeaways

• Microwave stains form from food splatter that flies up during uncovered heating, then hardens and lightly burns onto the interior with every reheating cycle it’s left through.
• Steam from hot water loosens dried-on stains without needing hard scrubbing or abrasive cleaners that can scratch the interior surface.
• The turntable and glass tray are usually dishwasher-safe, but check the model’s manual, since some manufacturers recommend hand washing only.
• Stubborn burnt stains need a baking soda paste after the steam method, which lifts stains without scratching the surface.
• Wiping up spills the moment they happen saves you a tiring deep clean later, a minute now beats half an hour afterward.

Why do stains build up inside a microwave?

When food heats uncovered, tiny droplets of moisture and grease fly up and stick to the walls and ceiling of the interior. If they’re not wiped away, they reheat with every subsequent cooking cycle and gradually harden into burnt-on stains that a normal wipe can’t shift. The problem gets worse with regular uncovered heating of greasy or saucy foods.

The steam cleaning method (the easiest and safest)

1. Place a microwave-safe cup or bowl of water with two tablespoons of white vinegar or half a sliced lemon. Keep vinegar away from bleach and other chlorine cleaners, since the mixture gives off toxic chlorine gas, and wipe the inside with a damp cloth before you try another product.
2. Run the microwave on full power for 3 to 5 minutes until a clear layer of steam fogs the interior glass.
3. Leave the door closed for two more minutes to let the steam keep loosening stains.
4. Open the door carefully, since the bowl and steam are hot, and wipe the inside with a cloth or soft sponge.
5. Wash the turntable and glass tray with regular soap and water, or place them in the dishwasher if the model’s manual allows it.
6. Dry the interior thoroughly before closing the door to prevent leftover moisture from building up.

Table: daily cleaning vs weekly deep clean

Stubborn burnt stains

If a stain remains after the steam method, make a paste of baking soda and a little water, apply it to the stain, wait 10 minutes, then wipe it off with a soft sponge. Baking soda lifts dried-on stains without scratching the surface the way abrasives or steel wool do, both of which should never go anywhere near the inside of a microwave.

A practical add-on for this step

An optional reusable vinegar-and-water steamer offers fill guidance for the same method. Follow its instructions for the mixture and run time; it does not establish faster cleaning than a microwave-safe bowl.

If you are comparing a replacement microwave

If you are also choosing a new microwave, compare the Toshiba MW3-AG20PE 20L for its cooking functions. Toshiba describes this model as a microwave with grill; the Saudi offer also lists a combined mode. Combined does not mean convection. Compare functions and dish fit in the microwave shortlist. The card retains the price and date of its recorded check.

When to stop and call a technician

• Sparks, arcing, smoke, or a sharp burning smell while it runs.
• The door, its seal, or its hinges are damaged, or the door no longer closes fully.
• The interior wall is visibly damaged.

If one of these happens, stop using the microwave, unplug it, and call a qualified technician. Once the checks above are done, if a smell stays, the turntable will not turn, it makes an unusual noise, residue sits where you cannot reach it without opening the casing, or the microwave runs but does not heat, ask a certified technician or the manufacturer’s service agent to check it, since the casing and the parts behind it are for a technician only.

The bottom line

Cleaning a microwave doesn’t require hard scrubbing: a bowl of water with vinegar or lemon loosens most stains within minutes, and stubborn burnt spots come off with a baking soda paste. Wipe up spills the moment they happen, and run the steam method at least once a week. If rice ever spills during reheating and leaves marks behind, our guide on how to reheat rice in the microwave without drying it out covers a method that avoids the mess in the first place. If an unpleasant smell lingers despite regular cleaning, read why does a microwave smell and how to get rid of it. If you’re still shopping for a microwave, browse our guide to the best microwave in Saudi Arabia, or if you’re torn between solo and grill read solo vs grill microwave, and for the full buying criteria see how to choose a microwave, or browse the full microwaves section.

Sources

• US FDA, “Microwave ovens”, how microwaves heat and safe use: https://www.fda.gov/radiation-emitting-products/resources-you-radiation-emitting-products/microwave-ovens
• Britannica, “Sodium bicarbonate”, background on what baking soda is: https://www.britannica.com/science/sodium-bicarbonate