Never put bare cast iron in the dishwasher; it strips seasoning and causes rust.
- Hand wash with mild soap, dry immediately, and oil after each use.
- Enameled cast iron is dishwasher safe but hand washing is gentler.
- If you accidentally run a pan through, re-season it to restore the surface.
What happens if you put cast iron in the dishwasher?
The dishwasher's detergent is abrasive and breaks down the polymerized oil that forms the nonstick seasoning. High heat and prolonged moisture accelerate rust formation on bare iron. Owners report that even one cycle can leave a gray film and orange spots. The machine's water jets also knock the pan around, risking chips or cracks. In short, the dishwasher undoes years of careful seasoning.
How should you clean cast iron instead?
Hand wash with hot water and a stiff brush or non-scratch scrub pad. Use a small amount of mild dish soap if needed, but avoid lye-based soaps. Dry the pan immediately with a towel or over low heat on the stove. Rub a thin layer of cooking oil over the entire surface before storing. This routine keeps the seasoning intact and prevents rust.
Are there any cast iron pieces that are dishwasher safe?
Enameled cast iron, like Le Creuset or Lodge enameled models, is generally dishwasher safe, but hand washing is still recommended. The enamel coating protects the iron from water and detergent. However, harsh detergents can dull the enamel's shine over time. Check the manufacturer's label; some brands explicitly say top rack only. Bare cast iron, including skillets, griddles, and Dutch ovens, should never go in the dishwasher.
What about cast iron pans with a factory seasoning?
Factory-seasoned pans, such as those from Lodge, are not dishwasher safe. The factory seasoning is just as vulnerable as a homemade one. Dishwasher cycles will strip it, leaving the pan exposed to rust. If you accidentally run one through, you can re-season it by coating with oil and baking at high heat. But prevention is easier than restoration.
Can you put cast iron in the dishwasher if it's rusted?
No, putting a rusted cast iron pan in the dishwasher will make it worse. The moisture and detergent accelerate corrosion. Instead, remove rust with steel wool or a chainmail scrubber, then re-season. After that, maintain it with proper hand washing. Dishwasher use is never a solution for rust.