We have over 50 pieces of cast iron (yeah, I know; but we haven't found a 12-step program to curb our addiction). We scrub them out when new, or bought used, with soap and water. And once on a while, I use soap and water if the item gets too gunked up after cooking. Most of the time we can get away with just boiling with a bit of water. The newer Lodge pans have a rougher cooking surface than a Griswold or CHF pan from the early 1900's, so they don't clean up as nicely with just a paper towel. I'm not afraid of soap; been eating off cast iron for years with no ill effects or off flavors.
2012 Rockwood 8293RKSS
2006 Dodge Ram 2500 5.9L Cummins Turbodiesel 4x4; 2012 Ford Escape 4x4. 3 very pampered cats.
Days camped: 2011: 61; 2012: 66 Days; 2013: 69;2014: 68 2015: 90 Days camped 2016: 34