To restore old, greasy, or rusted cast iron stove grates, strip the built-up residue with a soak (e.g., hot water and dishwasher tabs), scrub away rust with steel wool, and re-season them by baking a thin layer of oil in the oven at 400∘ F for one hour.
Remove grates. Use a no-scratch cleaning pad and clean with hot water and mild detergent or a paste made of baking soda and water. Use degreasers or Easy-Off® Fume Free Oven Cleaner with a blue Scotch-Brite™ pad sparingly.
The warm water and soap will help to loosen stubborn grease and grime, making it easier to remove. Get Scrubbing: Armed with a Non-Scratch Wonder Scourer, gently scrub the soaked grates to remove any remaining residue. Avoid using abrasive materials like steel wool, as they can scratch the surface of the cast iron.
Baking Soda Paste
To make cast iron stove grates look new again, dissolve built-up grease with a hot water soak or a baking soda paste. Scrub away debris with a scourer, then dry completely. Finally, restore their deep black color by applying a cast iron Stove Polish or re-seasoning them with cooking oil.
Never clean cast iron with the dishwasher, harsh abrasives (like steel wool or scouring pads), or caustic cleaners (like oven cleaner or bleach). These methods will quickly strip the protective, non-stick seasoning, leaving the bare metal exposed to rust and corrosion.
Yes, you should absolutely oil (or "season") your cast iron stove grates. Just like cast iron skillets, untreated cast iron stove grates are porous and prone to rust. Applying a very thin layer of oil creates a non-stick barrier that prevents moisture and food spills from causing rust or sticking to the iron.
Yes, WD-40 can remove rust from cast iron. However, how you use it depends entirely on whether the item is for cooking or woodworking/tools.
Step 3: Create a baking soda mixture
If your grates or caps are very dirty, create a paste by mixing three parts baking soda to one part water.
Common cast iron cleaning mistakes usually stem from the age-old myths of treating them like non-stick pans. The most common errors include soaking in the sink, using the dishwasher, using harsh metal scourers, and air-drying, all of which destroy the seasoning and cause rusting.
Yes, you can absolutely use Dawn dish soap on your grill grates. It is a highly effective degreaser for cutting through stubborn, baked-on food and grease.
Professionals rely on commercial degreasers or a combination of high-powered cleaning agents like Bar Keepers Friend or Easy-Off Professional Heavy Duty Oven Cleaner to cut through baked-on grease and carbon without excessive elbow grease.
Cleaning grates—whether for your barbecue or oven—requires matching the right technique to the material. The most common mistakes include using dangerous wire brushes, putting delicate grates in the dishwasher, leaving protective seasoning off cast iron, and applying harsh chemicals that taint your food.
Yes, you can safely use Dawn dish soap to clean cast iron. The old rule about never using soap stems from historic soaps made with harsh lye, which would strip the pan's seasoning. Modern dish soaps are mild and won't damage a properly seasoned pan.
Yes, vinegar is highly effective at removing rust from cast iron. Its natural acidity dissolves the rust, but because the acid is so strong, it must be carefully controlled to prevent permanently damaging the metal.
Yes, Coke can remove rust. It works because it contains phosphoric acid, which breaks down iron oxide.
To restore old, greasy, or rusted cast iron stove grates, strip the built-up residue with a soak (e.g., hot water and dishwasher tabs), scrub away rust with steel wool, and re-season them by baking a thin layer of oil in the oven at 400∘F for one hour.
unless they're really rusty you should be able to just take the rust off with a wire brush. After that just reseason them like they're a pan (wipe them down with a VERY THIN coat of cooking oil and bake them at 400-450 for an hour, repeat once or twice as needed) and you should be good.
The best cleaners for cast iron grates are natural vinegar and baking soda for indoor stovetop grates, and specialized cleaners like Goo Gone Grill and Grate Cleaner or Weber Grate Grill Cleaner for heavy-duty outdoor grill grates. Always avoid harsh chemical degreasers and wire brushes that can strip protective seasoning or chip enameled surfaces.
What Not to Cook in a Cast-Iron Skillet
Cast iron skillets are nearly indestructible. The seasoning can almost always be stripped and restored, but you can permanently ruin the skillet itself by exposing it to extreme thermal shock that cracks or warps it, melting lead or chemicals in it, or letting it rust to the point of structural decay.
The best oil for seasoning cast iron is one that is refined, neutral, and has a high smoke point (above 400∘F400 raised to the composed with power F400∘F / 204∘C204 raised to the composed with power C204∘C). Top choices include grapeseed oil, avocado oil, and canola oil. These oils polymerize effectively into a durable, non-stick layer without leaving a sticky residue.