Anyone who has run a tandoor for more than a week knows the truth: the cooking is the easy part. The cleaning is what separates an oven that lasts fifteen years from one that cracks, smokes, and starts making every naan taste faintly of last month’s chicken tikka.
The good news is that a tandoor is not a fussy appliance. It does not need chemicals, it does not need scrubbing pads, and it certainly does not need the kind of deep-clean routine you’d give a convection oven. What it needs is consistency, a bit of heat, and an understanding of what clay actually is.
Here’s how to do it properly.
Why Tandoor Cleaning Is Different From Every Other Oven
The inner wall of a traditional tandoor is unglazed clay. That means it is porous. It absorbs — moisture, oil, smells, and unfortunately, anything you spray on it.
This single fact drives almost every rule in this guide. Detergent soaked into clay does not rinse out. It sits there, waits for the next firing, and releases a chemical smell straight into the bread you’re pressing against the wall. Cooks who “deep clean” a tandoor with dish soap the way they’d clean a steel range often ruin the oven permanently and never understand why.
The second fact: clay hates thermal shock. Cold water on a hot wall causes hairline cracks that widen over months until a whole section fails. Patience is a cleaning tool.
If you’re still shopping and comparing options, it’s worth checking what a well-built tandoor oven for sale actually looks like on the inside — wall thickness and clay quality make a real difference to how easy the thing is to maintain.
What You Actually Need
You don’t need much. A short list, and most kitchens already have half of it.
- A long-handled tandoor brush or a wire brush with a heat-resistant handle
- A metal scraper or a flat skewer
- Clean cotton cloths (old kitchen towels work perfectly)
- A bucket of plain warm water
- An ash shovel or small scoop
- Mustard oil or any neutral cooking oil
- Heat-resistant gloves
- A stiff broom or vacuum for the base area
Notice what’s missing: no chemical cleaners, no degreasers, no oven sprays, no scouring powder. If someone tries to sell you a “tandoor cleaning solution,” walk away.
The Daily Clean: Five Minutes at the End of Service
This is the routine that does ninety percent of the work. Skip it and everything else becomes harder.
Step 1 — Burn it off. Before you shut down, let the tandoor run hot for ten to fifteen minutes with nothing inside. High heat carbonises the fat splatter on the walls and turns sticky residue into dry, brittle flakes. This is the single most effective cleaning action available to you, and it costs nothing.
Step 2 — Scrape while it’s warm, not hot. Once the tandoor has cooled to the point where you can hold a hand near the mouth without flinching — warm, not scalding — take your brush and work the inner walls in downward strokes. The carbon flakes will come away easily. Don’t attack it. Firm, steady pressure is enough.
Step 3 — Wipe with a damp cloth. Wrap a clean cotton cloth around a long skewer or stick, dip it in plain warm water, wring it out well, and wipe the walls. Wrung out means barely damp. You’re lifting dust and loose carbon, not washing anything.
Step 4 — Clear the base. Remove the ash and any dropped food from the bottom of the pit. Old ash holds moisture, and moisture in a clay base is how you get cracking and bad smells.
Step 5 — Cover it. Once fully cool, put the lid on. This keeps out dust, insects, and — in outdoor setups — rain.
That’s it. Five minutes, every day, and your tandoor will stay in good shape indefinitely.
The Weekly Deep Clean
Once a week — usually on your slowest day — give it a bit more attention.
Start with the same burn-off, but run it longer, closer to twenty-five or thirty minutes at full heat. Let the oven cool naturally afterward. Do not rush this with fans or water.
When it’s warm, brush the walls thoroughly from top to bottom, paying attention to the shoulder area just below the mouth where fat tends to accumulate and go tarry. Use the scraper for stubborn hardened deposits, holding it at a shallow angle so you’re lifting the crust rather than gouging the clay.
Wipe down with a damp cloth two or three times, rinsing the cloth between passes. Then, and this is the step most people forget, wipe the interior with a light coating of mustard oil on a clean cloth. This is the same principle as seasoning cast iron. It seals the surface slightly, keeps the clay from drying out, and helps the next batch of naan release cleanly.
Restaurants running an eight-to-ten-hour commercial tandoor service will want to do this twice a week rather than once, simply because of the volume of fat going through the oven.
Monthly and Seasonal Maintenance
Every month, take twenty minutes to inspect rather than clean.
Look for hairline cracks in the clay. Small surface cracks are normal and cosmetic — clay expands and contracts, and a network of fine lines is a sign of a well-used oven, not a failing one. What you’re watching for are cracks wider than a credit card edge, or cracks that run vertically for more than a few inches. Those need an attention before they spread.
Minor cracks can be filled with a paste of clay and water, or a proper tandoor repair mix, applied and then cured with a slow, low fire over several hours. Never fire a freshly patched tandoor at full heat.
Check the insulation layer and outer casing for damage. Check that the drainage or ash channel at the base is clear. On gas models, inspect the burner ports for blockage and the gas line for wear. On charcoal models, check the air vent moves freely.
If your tandoor sits idle for a long stretch — seasonal restaurants, catering operations, home users in winter — fire it gently for thirty minutes before storing it, make sure it’s bone dry, oil the interior, and cover it fully. Damp is the enemy of stored clay.
The Exterior
The outside is far more forgiving. Stainless steel casings clean with warm soapy water and a soft cloth, then a dry buff to prevent water spots. Copper exteriors need a proper copper polish occasionally to keep their colour. Painted or powder-coated finishes just need wiping down.
Keep soapy water away from the mouth of the oven — that’s the one place where exterior cleaning can contaminate the interior. Tilt your cloth away from the opening.
Mistakes That Destroy Tandoors
A short list of things people genuinely do, and shouldn’t.
- Pouring water into a hot tandoor. The clay will crack, sometimes immediately and audibly. Always cool first.
- Using detergent or chemical cleaner on the clay. As covered above — the clay absorbs it, and every future dish carries the taste.
- Scrubbing with steel wool. It abrades the clay surface and creates rough patches where bread sticks and fat collects. A brush is enough.
- Cleaning only when it looks dirty. By the time carbon buildup is visible from across the kitchen, it’s already thick enough to affect heat retention and flavour.
- Leaving ash overnight. It draws moisture into the base of the oven.
- Skipping the oil after a deep clean. Bare, freshly scrubbed clay dries out and starts pulling moisture from your dough.
Charcoal, Gas, and Electric: What Changes
The clay interior is cleaned identically in all three. The differences are below the cooking chamber.
Charcoal tandoors produce ash, so daily base clearing is non-negotiable, and the air vents need checking weekly for blockage.
Gas tandoors produce no ash but have burners that need periodic inspection. Blocked ports cause uneven heat, which people usually misdiagnose as a clay problem.
Electric tandoors need the heating elements kept free of drip and debris, and they must be fully cool and unplugged before any cleaning goes near them.
Frequently Asked Questions
How often should a tandoor be cleaned?
A quick brush and wipe after every service, a deeper clean weekly, and an inspection monthly. High-volume restaurants should deep clean twice a week.
Can I use soap or detergent inside my tandoor?
No. Unglazed clay absorbs it and it will affect the taste of your food permanently. Plain warm water and a damp cloth are all you need.
Is black carbon on the walls a problem?
A thin, even dark layer is normal and actually helps with heat retention and flavour. Thick, flaky, or sticky buildup is the problem — that’s what regular brushing prevents.
Why does my naan keep sticking?
Usually one of three things: the wall is too dry after cleaning and needs oiling, the tandoor isn’t hot enough, or there’s uneven carbon buildup creating rough patches.
What should I do about small cracks?
Fine surface cracks are normal. Wider or lengthening cracks should be filled with clay paste and cured with a slow, low fire before the next full firing.
How long should I wait before cleaning after cooking?
Wait until the oven is warm rather than hot — usually thirty to sixty minutes after shutdown. Never introduce water to a hot chamber.
Do I need to season a tandoor like cast iron?
Yes, lightly. A thin coat of mustard oil after each deep clean keeps the clay conditioned and improves release.
A Well-Built Tandoor Is Easier to Keep Clean
Here’s the part that gets overlooked in every cleaning guide: maintenance difficulty is decided at the point of purchase. Thin, low-fired clay cracks faster, absorbs more, and needs constant patching. Poorly designed bases trap ash. Cheap casings rust at the seams.
Tandoor Morni builds ovens with properly fired thick-walled clay, sensible ash clearance, and durable exterior casings — the kind of construction that turns cleaning into a five-minute habit instead of a weekly battle. Whether you’re setting up a restaurant line or putting one in your back garden, it’s worth browsing their range of tandoor oven for sale options before settling on something cheaper that costs more in repairs.
For restaurants, catering businesses, and anyone cooking at volume, their commercial tandoor range is built specifically for long service hours and heavy daily use — which, as any head chef will confirm, is exactly when build quality stops being a luxury and starts being the difference between a good service and a bad one.
Look after the oven, and it will look after you for years.