Cleaning Cast Iron Pans

I've got some old cast iron frying pans
and found out this way to clean them up.

Pre heat the oven to 300 degrees F.
Scrub the skillet with steel wool
to remove the rust. Wash well with hot water.
Dry the skillet over a medium flame.
Rub the skillet with oil, and wipe it,
spread it with a paper towel.
It should glisten, but not drip.
Place it on the flame until it is quite hot.
There will be oil drips.
Wipe it out again and then put it
in the oven upside down.
Leave it for an hour or more.
Turn off the oven and allow the skillet to cool.
From now on, wash only with hot water
and scrub with salt or a soap free scrubber.
Once your skillet is well seasoned,
it is OK to wash it with soapy water.
Just dry it thoroughly and place over a very
low burner on the stove to be sure it is dry.