How to Clean a Pizza Stone (2026): Scrape, Wipe, Never Soap

Turn the oven off and leave the stone where it is until it is cool enough to hold comfortably, which on a thick stone is two hours or more. Pulling a 500°F stone out onto a counter is the second most common way owners crack one (the first is the cold-stone-into-hot-oven mistake covered in our how to use a pizza stone guide), and wiping a hot stone with anything damp is the same thermal shock in reverse.

Once it is cool, scrape any stuck cheese, sauce, or charred flour with a bench scraper, a metal spatula held at a low angle, or a dedicated oven brush with a scraper edge. Burnt material lifts off a cool stone more easily than you expect; it is glued on by sugars that go brittle as they cool. Then brush the surface with a stiff, dry brush to clear the crumbs and loose flour, because flour left on the stone burns on the next preheat and tastes bitter. Finish by wiping with a dry cloth, or one wrung out until it is barely damp if there is a sticky film. Let it air-dry before it goes back into a hot oven. That is the whole clean, and for most owners it happens once every few bakes, not every time.

A pizza stone works because it is porous: cordierite and ceramic have microscopic channels that pull moisture out of the dough on contact, which is what crisps a base better than a metal tray. Those same channels absorb anything liquid. Soap soaks in, survives the wipe, and bakes back out of the stone into the bottom of your next pizza; owners describe the taste for weeks afterward. Water from soaking or running the stone under the tap fills the pores, and when the stone hits 450°F on the next preheat that water flashes to steam and can crack the slab from the inside. A dishwasher is both problems at once, plus a hot-wet-cold cycle the stone was never built for.

Oil is the mistake made with good intentions. Cast iron seasons because oil polymerizes into a hard film on a non-porous surface. A stone has no surface to build that film on; the oil sinks into the pores, smokes at pizza temperatures, and goes rancid between uses. Never oil a stone, never spray it, and never grease the pizza side of a pan that sits on it. If you want non-stick, that is what semolina, cornmeal, or a sheet of parchment under the dough is for.

Stains are not dirt. A stone darkens unevenly within a few bakes, then keeps darkening for years, and the blotchy black-and-tan surface that results is baked-in oil and sugar that has carbonized inside the pores. It is sterile at 450°F, it does not transfer to food, and owners treat a well-blackened stone as a sign of a well-used one. No cleaning method removes it, and chasing it with abrasives just wears the surface. Stop trying.

Burnt-on cheese or a sauce spill is a different matter: it is sitting on top of the stone, not inside it. Let the stone cool, scrape what lifts, then run the oven's next preheat with the stone in place; most of what remains carbonizes to ash and brushes off afterward. For a stubborn patch, the community's accepted deep clean is a paste of baking soda and a splash of water, worked in with a stiff brush, wiped away with a barely damp cloth, and then, critically, the stone is left to air-dry for a full 24 hours before it sees heat again, so no moisture is trapped in the pores. Coarse salt rubbed in with a dry cloth works as a gentler abrasive for surface residue. Skip oven cleaner, bleach, vinegar, and anything with a fragrance; all of it goes into the stone.

Self-clean cycles: take the stone out first. A self-clean cycle runs around 900°F, higher than many kitchen stones are rated for, and the rapid ramp is exactly the thermal shock that cracks them. Some owners do use the cycle deliberately to burn a cordierite stone clean and report no damage, but the manufacturers we track tell you not to, and a cracked stone is not covered when you do.

Outdoor pizza oven stones (the cordierite floor in an Ooni, Gozney, or Solo Stove) are cleaned almost entirely by heat. Run the oven to its maximum for 20 to 30 minutes after the last pizza, let it cool, brush the ash off with a long-handled brush, and flip the stone periodically so both faces get the burn-off. Our pizza oven cleaning guide walks through the full routine, including the stone-flip and storage. Never hose an outdoor stone, for the same reason you never soak a kitchen one.

Mold appears on stones stored damp in a garage or left in a wet outdoor oven over winter. It is surface growth on absorbed moisture, not rot: scrape and brush the visible mold off, then bake the stone empty at the oven's maximum for 30 to 45 minutes, which sterilizes it. Store a stone dry, indoors, or inside a covered oven; our oven cover rankings exist mostly to keep that stone dry between sessions.

A clean crack straight through a stone does not have to end it; many owners keep baking on two halves pushed together for years. What retires a stone is crumbling, flaking, or a crack that shifts under the peel. At that point the replacement decision is the one our stones and steels rankings make: a thick cordierite stone like the Unicook 15 x 12 (around $29 at time of writing) is the value pick and shrugs off frozen pizzas and thermal shock better than thin ceramic, while a baking steel removes the whole cracking problem and cleans like a skillet. Our stone vs. steel comparison covers the trade-off, and how to use a pizza steel covers the very different care routine a steel wants.