Commercial oven cleaners work, but they’re harsh — fume-heavy, toxic to skin, and absolutely not the kind of thing you want lingering on the surfaces your food touches. The good news: a $5 trio of bicarb soda, white vinegar and a lemon will lift months of baked-on grease just as effectively, and it’s safe to use with kids, pets and food-prep surfaces nearby.
What you’ll need
- 1 cup bicarbonate of soda (baking soda)
- ½ cup white vinegar in a spray bottle
- 1 lemon, halved
- Warm water
- A spatula or old plastic card (avoid metal — it scratches enamel)
- Microfibre cloths
- Rubber gloves
Step 1 — Empty the oven and remove the racks
Pull the racks out and set them aside in the laundry sink or bath. Sweep loose crumbs out of the oven cavity with a dry cloth or handheld vacuum. The cleaner you start, the less paste you’ll need.
Step 2 — Make a thick bicarb paste
In a small bowl, mix bicarbonate of soda with a few tablespoons of warm water until you get a spreadable paste — roughly the consistency of toothpaste. Add water slowly; too thin and it runs off the oven walls.
Step 3 — Coat the inside of the oven
Wearing gloves, smear the paste across the entire interior — base, walls, roof and the inside of the door glass. Avoid the heating elements, the fan and the door seal. Be generous on grease build-up; the paste should look almost white over the worst spots.
Step 4 — Wait (this is where the magic happens)
Leave the paste to work for at least 8 hours — overnight is ideal. Bicarb is mildly alkaline, and given time it slowly breaks down the grease into a softer film you can simply wipe away.
Step 5 — Scrub the oven racks separately
While the paste is working, soak the racks in hot water with a generous shake of bicarb and a glug of dish soap. After a few hours, scrub with a non-scratch pad and rinse. For racks that haven’t been cleaned in years, half a dishwasher tablet dropped into the soak speeds things along.
Step 6 — Wipe out the paste
Use a damp microfibre cloth and a spatula to lift the paste away. Most of the grease comes off with it. For stubborn patches, spray the area with white vinegar — you’ll see it foam as it reacts with the leftover bicarb. Wipe again, and the spot should be clean.
Step 7 — Finish with a lemon polish
Squeeze half a lemon onto a damp cloth and wipe down the inside of the door glass and the trim. Lemon cuts any greasy film left behind and leaves the cavity smelling fresh — much better than the chemical haze that lingers after store-bought cleaner.
How often should you do this?
For most Australian households, a deep oven clean every 3 months keeps grease from baking on hard. If you roast often or do a lot of high-temp cooking, monthly is better. A 5-minute wipe-down with a damp bicarb cloth after each big cook will stretch the gap between deep cleans.
When to call a professional
If your oven hasn’t been cleaned in years, the door has a sealed double-glazed glass panel that needs disassembly, or you’re preparing a property for an end-of-lease inspection, a professional clean is faster and protects your bond. Our deep-clean and end-of-lease teams use the same eco-friendly, non-caustic methods — just at a much larger scale.
Frequently asked questions
Will bicarb soda damage my oven?
No. Bicarb is a mild abrasive and very gentle on enamel and stainless steel. Just keep it off the heating elements, the fan and any rubber seals.
Can I clean a self-cleaning oven this way?
Yes — and many appliance manufacturers actually recommend a manual bicarb clean over the high-heat self-clean cycle, which can damage seals and internal components over time.
My oven still smells after cleaning. What should I do?
Run the oven empty at 200°C for 15 minutes with a heatproof bowl of water and lemon slices inside. The steam lifts any residual grease and the lemon neutralises odours.
Is this method safe around food?
Completely. Bicarb, vinegar and lemon are all food-safe. Once you’ve wiped the cavity dry, you can use the oven straight away — no waiting for fumes to clear.