How to Clean a Commercial Oven? | The Only Process You Need

Cleaning a commercial oven the right way comes down to one thing: shutting it down completely and using the right tools. A hot oven or an abrasive pad can ruin the unit, and skipping the power disconnect is a genuine safety hazard. The process itself is straightforward, but the order and the precautions matter. Here is the step-by-step method that keeps your oven clean, your food tasting right, and your equipment in service for years.

Preparing the Oven: Power, Gas, and Cooling

Before you touch a cloth, the oven must be fully off and cool. This is the step that keeps you safe, and it is the one most often rushed. Turn off the unit at the control panel, and if it is a gas model, close the gas line. Unox’s cleaning guide is explicit here: disconnect the power and any gas lines, then wait for the unit to cool completely to avoid burns. Vulcan’s maintenance advice echoes this, stating the oven must be set to the off position and cool before cleaning begins.

While the oven cools, gather your supplies. You will need a non-abrasive sponge or cloth, mild dish soap, a commercial oven cleaner or degreaser (check the label for your surface type), and a separate container of warm, soapy water for the racks.

Removing and Cleaning Racks and Trays

Take out every removable part—racks, trays, and any other components—and clean them away from the oven cavity. This is why you can’t do a proper job with everything still inside. Scrubbing the racks in the sink gives you the leverage to actually remove baked-on grease, and it keeps abrasive residue out of the oven’s interior.

Soak the racks in warm, soapy water first to loosen the grease, then scrub with a non-abrasive brush or sponge. The same rule applies here as everywhere else: skip the steel wool, wire brushes, and scouring pads. These tools scratch stainless steel and damage the protective finish. Unox’s guide specifically warns against abrasive scrapers on the racks.

Cleaning the Interior and Protecting the Electronics

Once the racks are out, scrape or wipe away loose debris from the cavity, then apply your oven cleaner or degreaser. Follow the product label for the dwell time—how long the cleaner must sit before it can break down the carbon—and then scrub with a non-abrasive sponge. For routine maintenance, warm water and mild dish soap work well; for baked-on residue, you need the stronger commercial cleaner.

Protect the components that shouldn’t get wet. Unox’s guidance warns against getting water and soap on wiring, switches, or light sockets. Vulcan’s tips echo this, advising you to avoid the heating elements and the fan entirely when applying cleaner. You are cleaning the cavity surfaces, not dousing the electronics. Leaving cleaner residue behind is also a problem; Forte’s guide notes it can affect food flavor and safety, so make sure every surface is rinsed and wiped down thoroughly.

For the exterior, use a mild soap-and-water solution and wipe in the direction of the stainless-steel polish lines. Avoid abrasive tools, and skip the vinegar and chlorine-based cleaners—corrosive chemicals will dull the finish over time.

Rinsing, Drying, and Testing the Oven

This last phase is where a rushed job falls apart. Dry every surface completely before you reassemble anything. Wet components are a breeding ground for issues, and failing to dry parts fully before putting them back is one of the common mistakes the manufacturer guides call out. Once everything is dry, replace the racks and trays, and test the oven to confirm it works before returning it to service.

How often should you do this? Vulcan recommends daily wipe-downs of the exterior and interior, plus a weekly deep clean with a commercial oven cleaner. That cadence keeps buildup manageable and makes each cleaning session faster than the last. Following the label on your cleaner is the single most effective way to avoid damaging the oven’s finish.

For a tested roundup of the best products for this job, see our reviews of the top commercial oven cleaners to find the right one for your kitchen.

When you are ready to buy, check our best commercial oven cleaner recommendations.