How to Deep Clean Your Oven Interior

Oven cleaning sits in that category of household tasks people avoid until the smell starts reaching the living room. The reality is simpler than it looks: you're not fighting permanent damage, just built-up grease and burnt food residue that responds well to basic chemistry and patience. A thorough interior cleaning means you can actually see the back wall again, your heating elements work more efficiently, and you stop wondering what that smoke is about. The difference between a grimy oven and a clean one isn't special equipment—it's method, time, and not being afraid to let a paste do the work while you're sleeping.

1. Clear the Workspace. Pull the racks straight out—they usually slide out on supports at the sides. If they're stuck, don't force them; gently wiggle side to side while pulling. Set them aside in your bathtub or a large outdoor space where you can soak them later. This gives you full access to the oven walls and floor.
2. Remove Loose Debris. Use a small brush or handheld vacuum to remove crumbs, burnt bits, and loose ash from the oven floor and corners. Work methodically from back to front. You're not cleaning yet—just clearing out the worst of it so your paste can contact the actual surfaces.
3. Mix Your Paste. In a small bowl, mix half a cup of baking soda with three tablespoons of water. Stir until you have a spreadable consistency—like thick pancake batter. It should stick to a vertical surface without running. If it's too thin, add more baking soda; if it won't spread, add water a teaspoon at a time.
4. Coat Every Surface. Using a plastic spreader, old credit card, or even a butter knife, apply the paste to every interior surface of the oven except the heating elements themselves. Cover the floor, side walls, back wall, and ceiling. Avoid the actual element wires, but coat everything around them. Work systematically so you don't miss spots. The paste will be white and thick.
5. Let Chemistry Work. Close the oven door and walk away. Overnight means 12–16 hours ideally. The baking soda works by breaking down burnt-on grease chemically, not through scrubbing, so time is doing the actual cleaning. During this time, soak your racks in hot, soapy bathwater.
6. Trigger the Reaction. Fill a spray bottle with white vinegar (undiluted). Open the oven door and spray the dried baking soda paste directly. You'll see it fizz and bubble—that's the chemical reaction you want. Spray until the paste is wet and foaming. The vinegar reacts with the baking soda and helps lift the residue.
7. Lift the Grime. Using a plastic dough scraper, stiff rubber spatula, or plastic putty knife, scrape the paste and loosened grime from all surfaces. Work from top to bottom so debris falls down. For stubborn spots, spray again with vinegar and let it sit for two minutes before scraping. Don't use metal scrapers on enamel—they'll scratch the finish.
8. Polish to Shine. Use damp microfiber cloths or folded paper towels to wipe the entire interior. You're removing the paste residue and any grime the paste has lifted. Rinse your cloth frequently in warm water. Make several passes—the first pass removes most of the paste, but a second and third pass gets the oven actually clean and shiny.
9. See Clearly Again. Mix a fresh paste of baking soda and water. Spread it on the glass door—both inside and out. Let it sit for 15 minutes, then spray with vinegar and scrape gently. Wipe with a damp cloth. The glass takes the same treatment as the oven walls but needs less time because the surface is smoother.
10. Restore the Racks. Pull the racks from the bathtub. If they've been soaking since last night, the grime should be soft. Use a scrub brush, steel wool, or a scouring pad to remove the loosened residue. Rinse thoroughly under running water. If any buildup remains, make a paste and treat those spots like you did the oven.
11. Reassemble Your Oven. Towel-dry the racks completely so they don't drip or rust. Slide them back into the oven, one at a time, making sure they sit level and secure in their supports. Check that each rack is stable before moving to the next one.
12. Inspect Your Work. Do one last pass with a dry cloth around the interior, removing any remaining dampness. Look at the walls and floor in good light—you should see a clean, bare enamel surface. If you spot any remaining buildup, spray that area with vinegar and wipe it down.