How to Clean Stove Burner Grates
Cast iron stove grates accumulate carbonized grease, burnt food deposits, and baked-on residue that become increasingly difficult to remove over time. The challenge is that cast iron is porous and cannot be soaked in water for extended periods without risk of rusting. The two most effective methods both use chemistry to do the work.
Method 1: Dish Soap Overnight Soak
- Place the grates in a large sink or plastic tub
- Fill with hot water and a generous amount of dish soap — enough to fully cover the grates
- Allow to soak for 2–4 hours, or overnight
- The extended soak time softens the carbonized deposits significantly
- Scrub with a stiff-bristled brush or steel wool pad — the deposits should break loose much more easily than without soaking
- Rinse thoroughly and dry immediately — place in a warm oven for 10 minutes to ensure they are fully dry to prevent rust
Method 2: Ammonia Bag Method (Most Effective for Heavy Buildup)
- Place each grate in a large zip-lock bag or sealed garbage bag
- Add 1/4 cup of household ammonia to each bag — the grate does not need to be submerged
- Seal the bag completely and leave overnight or 12 hours
- The ammonia fumes (not the liquid) penetrate and soften the carbonized grease
- Open the bags outdoors — the fumes are strong. Rinse the grates thoroughly.
- Scrub any remaining deposits — they should come off easily after the ammonia treatment
- Rinse thoroughly and dry completely
After Cleaning: Season the Grates
- Rub a thin coating of vegetable oil over the clean, dry grates
- Place in a 180°C oven for 30 minutes to season — this creates a non-stick coating and prevents rust
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