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

6. After an hour, turn off the oven and let the cookware cool down inside the oven before removing it.
6. Regular Maintenance
After re-seasoning, use and maintain your cast iron cookware properly to prevent future mishaps. Always hand wash with hot water and a stiff brush, dry completely, and apply a light coat of oil after each use.
Conclusion
While putting cast iron in the dishwasher is not recommended, it doesn’t have to mean the end of your beloved cookware. With proper care and re-seasoning, you can bring it back to life. Remember that cast iron is resilient but benefits greatly from proper maintenance. By following the steps outlined above, you can continue to enjoy cooking with your cast iron for many years to come.