Made the mistake of putting cast iron in dishwasher. What do I do now? Is it ruined for good?

Understanding the Impact of the Dishwasher on Cast Iron
The primary reason cast iron should not go in the dishwasher is that the prolonged exposure to water and harsh detergents can strip away the seasoning – the oil baked onto the iron that protects it from rust and creates a non-stick surface. Moreover, the dishwashing process can lead to rusting, which, if left unchecked, can permanently damage the pan. But if the deed has been done, here is a strategic approach to assess and revive your cast iron cookware.
1. Assess the Damage
Start by taking a close look at your cookware. Is there rust? Has the seasoning been removed, leaving bare metal? Does it have a dull, gray appearance?
2. Remove Any Rust
If rust is present, it’s important to remove it to prevent further damage. You can do this with a scouring pad or steel wool. Gently scrub the rusted areas until the rust is gone. Some elbow grease will be required, but generally, this step can clear away superficial rust.
3. Wash Your Cookware by Hand
After de-rusting, wash the cookware by hand with warm water. It’s crucial to avoid soap as it can further strip the seasoning. Instead, use a stiff brush or non-abrasive scrubber to clean the surface.

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