[header] How to season a cast iron skillet [title] Preheat the oven to 350 ºf (177 ºc). [step] Don't plan on cooking anything else in the oven while you season the cast iron, since the process can be affected by steam created by cooking other food. [title] Wash and dry the skillet. 
[step] Use soap and a scrub brush to completely scour it. This is the only time you'll be using these items to clean your skillet; after it's seasoned, you no longer scour it.