If there is a silver or light-colored spot in the middle of your cast iron skillet after leaving it to dry on the stove for too long, it's likely that the seasoning has been damaged or stripped off from that area. While the skillet may still be safe to use, it's essential to address the issue to prevent further damage and maintain its cooking performance.
Here's what you can do:
Assess the damage: Check the silver spot carefully to ensure it is not rust. If it's rust, you'll need to remove it before proceeding with re-seasoning.
Re-season the skillet: To fix the silver spot and restore the seasoning, follow these steps:
- Wash the skillet with warm water and a soft brush or sponge to remove any debris or residue. You can use a small amount of mild soap if needed, but avoid harsh detergents.
- Dry the skillet thoroughly with a towel to remove any moisture.
- Apply a thin layer of vegetable oil or any high-smoke-point oil (such as grapeseed or flaxseed oil) to the entire surface of the skillet, including the silver spot.
- Place the skillet upside down in your oven on the middle rack, with a foil-lined baking sheet or aluminum foil on the bottom rack to catch any drips.
- Preheat the oven to around 375°F (190°C) and bake the skillet for about 1 hour. Then, turn off the oven and let the skillet cool down in the oven.
Regular maintenance: To avoid future issues, always dry the skillet thoroughly after washing and store it in a dry place. Regularly seasoning the skillet and using it frequently will also help build up a strong and protective seasoning layer.
By re-seasoning your cast iron skillet, you'll be able to restore its non-stick properties, protect it from rust, and ensure it's safe for cooking. Just be sure to follow the steps carefully to properly season the entire surface, including the silver spot, for even and consistent performance.