If you want to remove the seasoning from a cast iron skillet, you can follow these steps:
Preheat your oven: Set your oven to a high temperature, usually around 450°F (232°C). This will help to loosen the seasoning and make it easier to remove.
Place the skillet in the oven: Put the cast iron skillet upside down on the oven rack or a baking sheet lined with aluminum foil to catch any drips.
Bake the skillet: Leave the skillet in the oven for around 1 to 1.5 hours. The high heat will cause the seasoning to break down and become brittle.
Remove the skillet: Using oven mitts or heat-resistant gloves, carefully remove the skillet from the oven and set it aside to cool.
Scrub the skillet: Once the skillet has cooled down, use a stiff brush or a scrubber to scrub away the loosened seasoning. You can also use steel wool or a cast iron chainmail scrubber. Scrub in circular motions, focusing on areas with stubborn seasoning.
Rinse and dry: Thoroughly rinse the skillet with warm water to remove any debris or residue. Avoid using soap, as it can remove the natural oils from the cast iron. Dry the skillet immediately using a clean towel or by placing it on a stovetop burner set to low heat to evaporate any remaining moisture.
Re-season the skillet: After removing the seasoning, it's necessary to re-season the cast iron skillet to restore its non-stick properties and protect it from rust. Apply a thin layer of oil (such as vegetable oil or flaxseed oil) to the entire surface of the skillet, including the handle. Make sure to coat both the interior and exterior surfaces. Wipe away any excess oil. Then, place the skillet upside down in a preheated oven at 400°F (204°C) for about an hour. This will allow the oil to polymerize and create a new seasoning layer.
Remember that removing the seasoning from a cast iron skillet is a labor-intensive process, and it should only be done when necessary. The seasoning on a cast iron pan develops over time and with regular use, enhancing its non-stick properties.