A microwave oven is a kitchen essential, but over time, it can develop unpleasant odours from food spills, burnt residue, or moisture buildup. These lingering smells can affect the taste and quality of food, making regular deodorising an important part of microwave maintenance.

Fortunately, there are simple and effective ways to remove odours and keep your microwave fresh. This article is a step-by-step guide on deodorising a microwave oven, using natural and practical methods to eliminate bad smells and maintain a clean appliance.
Common Causes of Bad Odours in a Microwave
Several factors can contribute to a smelly microwave:

- Food Splatters: Leftover food particles and grease can stick to the interior walls, releasing odours over time.
- Burnt Residue: Overheated food, popcorn mishaps, or accidental spills can create a burnt smell that lingers.
- Moisture Buildup: Steam from cooking can create a damp environment, leading to musty or stale odours.
Step-by-Step Guide to Deodorising a Microwave
1. Using Vinegar and Water
White vinegar is a natural deodoriser that helps break down stubborn grime:
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Click To Call: 1300 652 100- Fill a microwave-safe bowl with equal parts water and white vinegar (about 1 cup each).
- Heat the bowl in the microwave on high for 5 minutes until steam forms.
- Leave the microwave closed for another 5 minutes to let the steam loosen grime.
- Carefully remove the bowl and wipe down the interior with a damp cloth.
2. Using Baking Soda
Baking soda is excellent for absorbing odours overnight:
- Place an open container or small bowl of baking soda inside the microwave.
- Leave it overnight with the door closed to neutralise lingering smells.
- Remove the baking soda the next morning and wipe the interior with a clean cloth.
3. Using Lemon or Citrus Peels

Citrus is a natural freshener that leaves behind a pleasant scent:
- Slice a lemon in half and place it in a bowl of water, or add citrus peels to the water.
- Microwave on high for 3–5 minutes until steam forms.
- Let the steam sit for a few minutes before wiping down the microwave interior.
4. Deep Cleaning the Interior
After deodorising, give your microwave a thorough clean:
- Remove the turntable and wash it separately with warm, soapy water.
- Wipe down the interior walls, ceiling, and door with a damp cloth or sponge.
- Check the vents and wipe away any built-up residue to prevent future odours.
Preventive Measures
To keep your microwave fresh and odour-free, follow these simple habits:

- Cover Food While Heating: Use a microwave-safe lid or paper towel to prevent splatters.
- Clean Spills Immediately: Wipe away food spills as soon as they occur to prevent odour buildup.
- Ventilate After Use: Leave the microwave door open for a few minutes after cooking to allow moisture to escape.
- Perform Regular Maintenance: Deep clean the microwave weekly using the vinegar or citrus method.
When to Seek Professional Help
If persistent odours remain despite thorough cleaning, it may indicate a deeper issue:
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Click To Call: 1300 652 100- Burnt Electrical Smell: A lingering burnt smell could be a sign of wiring or component damage.
- Malfunctioning Ventilation: If food odours won’t dissipate, the microwave’s ventilation system may need servicing.
- Unexplained Smells: Unusual chemical or metallic odours should be checked by a technician to ensure safe operation.
Conclusion
Keeping your microwave clean and odour-free is simple with regular maintenance and natural deodorising methods. By using vinegar, baking soda, or citrus, you can eliminate lingering smells and ensure your microwave remains fresh and functional. Preventive care, such as covering food and wiping spills immediately, helps avoid odour buildup and extends the life of your appliance. If odours persist despite thorough cleaning, professional servicing may be necessary to address underlying issues.
Call a Local Appliance Tech Now
Same Day Repair* and 12 Month Parts Warranty - All Brands, Affordable Prices
Click To Call: 1300 652 100