How to Deodorize a Microwave Oven: Is It Worth Doing Yourself or Calling a Pro?

A foul-smelling microwave isn’t just unpleasant—it can affect the taste of your food and make your whole kitchen feel off. Whether it’s the aftershocks of burnt popcorn, leftover curry, or just months of built-up grime, bad smells in a microwave don’t go away on their own.

So, how do you properly deodorise microwave oven? Is it a simple DIY job, or a sign you might need a technician to give it a proper clean or inspection?

Let’s break it down.

What Causes Microwave Odours?

Microwaves are designed to be fast and convenient, but that convenience often means we neglect basic maintenance. Over time, small food splatters and spills build up inside. When they’re not cleaned properly, these residues get cooked again and again, causing unpleasant smells to set in.

Here are some common culprits:

• Spilled food or liquids that weren’t wiped up

• Burnt food particles (like popcorn or pizza crust)

• Strong-smelling ingredients like garlic, fish, or curry

• Poor ventilation or moisture build-up

• Mould or mildew in older units (especially around door seals)

DIY Microwave Deodorising Methods

For most smelly microwaves, a DIY clean is a good first step. Here are three tried-and-tested ways to deodorise your microwave naturally:

1. Steam Cleaning with Vinegar

• Fill a microwave-safe bowl with 1 cup of water and 2 tablespoons of white vinegar.

• Microwave on high for 5 minutes.

• Let it sit (door closed) for 2–3 more minutes to allow steam to loosen grime.

• Carefully remove the bowl and wipe the interior with a damp cloth.

2. Lemon Fresh Method

• Slice a lemon in half and place it in a bowl of water.

• Microwave for 3–5 minutes until steamy.

• The citric acid helps cut through grease, and the lemon neutralises odours.

3. Baking Soda Bowl

• Leave an open container of baking soda in the microwave overnight (microwave OFF).

• This helps absorb lingering smells, much like in a fridge.

Tip: Don’t forget to clean the turntable and check for grime around the door seal and vents.

When It’s Time to Call a Professional

If you’ve tried all of the above and the smell still won’t go—or if there’s a burning or electrical odour—you may need a professional inspection.

Here’s when to get expert help:

• The smell returns quickly after cleaning

• There’s visible mould or rust inside the unit

• Food heats unevenly or the microwave is sparking

• The door seal is damaged or loose

• You notice electrical smells or buzzing sounds

At that point, it’s not just about odour—it could be a safety or performance issue.

Can a Microwave Be Too Far Gone?

Yes. In some cases, especially with older or heavily neglected units, deodorising won’t fix deeper problems. For example:

• Damage to the internal cavity

• Worn-out door seals that trap moisture

• Faulty ventilation fans

In those cases, it may be more cost-effective to replace the unit, but don’t assume that right away. At Nationwide Appliance Repairs, we find that more than 90% of appliances are cheaper to repair than replace.

Prevention Tips to Keep It Smelling Fresh

Once your microwave is clean, here’s how to keep it that way:

• Wipe the inside regularly (especially after spills)

• Cover food with a microwave-safe lid or paper towel

• Avoid overcooking or burning food

• Leave the door open for a few minutes after use to let moisture escape

• Deep clean monthly with vinegar or lemon steam

Need Help? We’ve Got Your Back

If your microwave still smells after a deep clean—or you’re worried it’s a sign of something more—book a technician with Quality Appliance Repairs. Our experienced team services all major brands, and our vans are stocked to handle most repairs on the spot.

We offer:

• 12-month warranty on all parts

• 3-month labour warranty

• Fast service across Melbourne, Sydney, Brisbane, Perth, Adelaide, and Canberra

Call now or book online to get your microwave back in top shape.