Cast iron pans can stay sanitary and safe for use without using soap due to their unique properties and maintenance practices. Here's how:
Seasoning: Cast iron pans are typically seasoned, which involves coating the pan with a layer of oil and heating it to create a polymerized surface. This seasoning creates a natural non-stick coating and helps protect the pan from rusting. The seasoned surface helps prevent food from sticking and makes cleaning easier.
Heat and oil: When you cook with a cast iron pan, the high heat kills bacteria and other microorganisms present on the surface. The hot oil used during cooking also helps eliminate bacteria.
Proper care after use: After cooking, it's important to clean a cast iron pan properly to maintain its sanitation. Here's a typical cleaning process:
a. Remove food residues: Use a stiff brush or a non-abrasive scrubber to remove any remaining food particles. You can also use a small amount of salt as an abrasive if needed.
b. Rinse with hot water: Rinse the pan under hot water to remove loosened food particles. Avoid using soap, as it can remove the seasoned coating.
c. Dry thoroughly: After rinsing, dry the pan completely. Moisture can lead to rusting, so it's important to ensure the pan is dry. You can place it over low heat on the stove to evaporate any remaining moisture.
d. Apply a thin layer of oil: Once the pan is dry, apply a thin layer of oil to the entire surface. This helps maintain the seasoning and prevents rust. You can use a paper towel to spread the oil or simply rub it with your fingers.
By following these steps, the heat from cooking, proper maintenance, and the protective seasoning layer help keep cast iron pans sanitary and safe for use. The seasoning and the removal of food particles prevent the growth of bacteria and maintain the pan's cleanliness. It's important to note that if the pan becomes heavily soiled or develops rust, you may need to use soap and re-season it to restore its condition.