How to clean a cast iron skillet.

This pan was used two days ago to sear two beef roasts before going in crock pots. I seasoned the roasts with kosher salt and fresh cracked black pepper. It left quite the crusty mess in the pan, but watch how easily it cleans, in real time, with no spare hand to even hold the pan.

Look at the clean shot near the end. The crust left in the corners is from the factory pre-seasoning. Pre-seasoning is great to get a ready to use pan, but they use a thick seasoning material that is supposed to last a long time. If you make gravy, you'll use a wire whisk and even their heavy duty seasoning can't take that forever.
This pan will need seasoning soon. I plan to sand off the remaining factory seasoning and start afresh.