How to clean oven racks

Oven racks take the worst of the punishment in any kitchen — direct heat, dripping fat and boiled-over sauce, all baked on repeatedly until it forms a carbon layer that a normal wipe won't touch. Because racks come out of the oven entirely, though, they're actually one of the easier things to properly deep clean — you're not working in a cramped cavity, and you can let them soak for as long as they need without holding up the rest of the kitchen. Here's a method that works on genuinely bad buildup without scratching the metal or needing caustic oven cleaner.

What you'll need

• A bathtub, or a container large enough to fully submerge the racks
• An old towel or two, to protect the tub surface
• Dishwasher tablets or bicarbonate of soda
• Hot water
• A non-scratch scrubbing sponge or nylon brush
• Rubber gloves

Step 1: Line the tub and lay in the racks

Lay an old towel in the bottom of the bathtub to protect the surface from scratches, then place the racks on top. If your tub isn't big enough for all the racks at once, do them in batches — the soak is the important part, not doing them simultaneously.

Step 2: Fill with hot water and add your cleaning agent

Run hot water over the racks until they're fully submerged. Drop in 2–3 dishwasher tablets (or a generous few tablespoons of bicarbonate of soda if you'd rather avoid the fragrance in most tablets) and let them dissolve. The combination of hot water and the tablets' degreasing agents does most of the actual work here — you're not scrubbing against dry, hardened carbon, you're softening it first.

Step 3: Let them soak

This is the step that makes or breaks the result. Leave the racks to soak for a minimum of 4 hours; overnight is genuinely worth it for racks with heavy, months-old buildup. You'll often come back to find grease has visibly lifted and is floating loose in the water.

Step 4: Scrub

Drain the tub and, with gloves on, go over each rack with a non-scratch sponge or nylon brush. Softened grease should come away with moderate pressure — if a patch is still resisting, it's usually faster to re-soak that section for another hour than to scrub harder and risk scratching the metal or bending the wire.

Step 5: Rinse and dry

Rinse thoroughly under running water to remove any dissolved grease and cleaning residue, then dry completely before putting the racks back in the oven — wet racks in a hot oven can cause water spots or, in rare cases, warping.

For racks that won't come clean

Some racks — particularly older ones with years of carbon buildup — genuinely won't come back to bare metal with a soak-and-scrub approach alone, no matter how long you leave them. At that point the options are a stronger commercial degreaser (check it's rated safe for the rack's metal finish), or having them done professionally alongside the rest of the oven. It's usually the most time-consuming single part of a full oven clean, which is exactly why it's included as standard whenever we clean an oven.

No bathtub? A sink or outdoor tub works too

If a bathtub isn't practical, a large laundry sink, an outdoor tub, or even a wheelie-bin lid lined with a towel will all do the same job — the method only needs a container big enough to fully submerge the rack in hot water, not a bathtub specifically. For a single small rack, even a kitchen sink can work if you clean it thoroughly afterwards. The soak time matters far more than the container.

Keeping racks from building back up

A quick wipe-down with a damp cloth after any spill-heavy cook — rather than waiting for it to bake on over several more uses — makes the next deep clean noticeably easier. Lining the rack below whatever you're roasting with a sheet of foil or a tray also catches most drips before they ever reach the rack itself, which is often the single biggest reason some households need this soak-and-scrub method far less often than others.