How to clean cast iron (yes, you can use soap).
First yes - you can use soap.
Let's debunk the biggest myth up top: a small amount of dish soap won't ruin your cast iron. Today's soaps are milder and won't strip away well-established seasoning. For both bare and enameled cast iron, feel free to use warm soapy water.
The trick isn't avoiding soap - it's avoiding soaking for long periods and using harsh scrubbing tools that could damage the surface.
Cleaning enameled cast iron.
Enameled cast iron (like Le Creuset casseroles and similar pieces) is more forgiving than you think:
- Use soapy water and a gentle sponge or brush. No need for anything abrasive
- Baking soda paste (mixed with water or a little vinegar) works wonders on stained interiors
- Avoid metal scouring pads - they can scratch the enamel
- No seasoning needed - the enamel protects the surface, so there's no need to oil it afterward
Good to know: Discolouration on the inside is common and doesn't affect performance - it's often just caramelised oils from previous use.
Cleaning bare cast iron.
For uncoated cast iron skillets and pans, the method is slightly different:
- After cooking, wipe it out with a paper towel while it's still warm
- Use warm water and a gentle brush (or chainmail scrubber) to remove stuck-on food
- Dry immediately - cast iron rusts quickly if left wet
- Rub with a thin layer of oil and heat it briefly to maintain its seasoning
A note on seasoning: Seasoning is the thin layer of polymerised oil that builds up over time - it's what gives cast iron that naturally non-stick, dark patina. Treat it gently, and it'll reward you with decades of service.
Bonus tips.
- Rust? Don't panic. A bit of elbow grease and oil will bring it back to life
- Avoid soaking any cast iron - even enamelled versions can develop surface issues over time with prolonged water exposure
- Never use the dishwasher. The harsh detergent and moisture are a cast iron killer
Whether enamelled or not, cast iron is one of the most durable materials you can own — and it only gets better with age. Show it a little love and it'll be with you for life (and probably the next life, too).
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