Here is a goal: How to prepare a cast iron skillet if stains won't come free?

How would you accomplish this goal?

OPTIONS:
- Run water and soap over the bottom of the skillet and scrub with steel wool then place in  warm water to dry
- Run water and soap over the entire skillet and scrub with steel wool then place in a warm oven to dry
Run water and soap over the entire skillet and scrub with steel wool then place in a warm oven to dry