Mix 2 tbsp castile soap and 2 tbsp borax in hot water; cleaning guidance recommends to spray the oven from a bottle, wait 20 minutes, then scrub the softened grime away

Baked-on grease on your oven floor usually calls for a strong cleaner and a good pair of gloves. The University of Georgia Cooperative Extension recommends a gentler but still effective recipe made with two common household ingredients, though. Their recipe calls for 2 tablespoons of liquid soap with plant-based oils, such as castile soap, plus 2 tablespoons of borax, diluted with hot water in a spray bottle.

The exact UGA Extension oven cleaner method, step by step

Grab a spray bottle first, because the sequence matters. First, add the soap and borax, then top with hot water and shake well so the borax doesn't clump at the bottom. Because borax dissolves slowly and can settle out as the water cools, use the mixture soon after shaking it, and shake again if the sprayer starts to feel clogged. Spray the inside walls, especially the greasy areas, in a well-ventilated area, avoiding direct inhalation of the mist, then walk away for 20 minutes to let it loosen the buildup. After the waiting period, wipe or scrub the walls and racks, then rinse. This cleaner is one of several homemade cleaning solutions UGA Extension developed with the U.S. Department of Agriculture and Fort Valley State University, including a floor cleaner, a toilet bowl cleaner, and a drain cleaner. They involve common pantry and laundry room staples like vinegar and baking soda. Borax and castile soap are found in typical grocery stores and health food stores, not a specialty cleaning-supply aisle, which adds to the recipe's appeal.

Why store-bought oven cleaners carry so many warnings

The U.S. Consumer Product Safety Commission notes that many drain cleaners, oven cleaners, and lye-based products contain sodium or potassium hydroxide, chemicals powerful enough to require child-resistant containers and warning labels under federal law. This is not a criticism of such products; to clean heavily used drains and ovens, they are often formulated to be fast-acting and aggressively caustic, but it partially explains the appeal of something less potent, less quick, and less likely to prompt a trip to the hardware store armed with gloves and an open window on a weeknight.

Is borax actually safe just because it's "natural"

Labeling something as natural does not necessarily mean it is mild, and borax is a good example. The Environmental Protection Agency's Safer Choice program lists borax as associated with reproductive and developmental risks. Natural-sounding ingredients can pose the same hazards as synthetic ones, but that does not make the UGA recipe outright dangerous for oven surfaces. Store the borax solution in a securely closed, properly labeled bottle; keep it away from children and pets; and, if you can, limit bare-skin exposure to the mixed solution.

Tips for applying the mix cleanly and safely

A little technique can make the difference between a sparkling oven and one that looks streaky. Let the oven cool completely first, because spraying a still-hot interior can cause the solution to evaporate before it has time to loosen the grime. Use an old spray bottle and label it clearly, then apply the solution lightly; most of the cleaning happens after it sits. A plastic scraper or some non-scratch cleaning pads are often gentler on your oven's finish than steel wool. After you remove the grime, wipe the inside again with a damp cloth to remove any soap residue, making sure the surfaces are fully rinsed, since leftover oil-based residue can smoke or even flare up the next time the oven heats up. While the oven is being deep-cleaned, you can soak the racks in the same solution in a sink or tub to save time.

Who should actually try this castile soap and borax oven cleaner

This is not an endorsement of ditching all your cleaning products. It is simply a suggestion for one particular task, oven cleaning, that comes from a public university extension service, not a viral social media post. It is a great option for people trying to save money at the grocery store and limit their use of harsh chemicals at home. A two-ingredient spray is much easier to whip up on a busy weekend than a heavy-duty commercial cleaner, so save the strong stuff for truly egregious messes and use this simpler mixture on your oven-cleaning nights.