Now that I have just retired, I want to begin to use my cast iron cookware that I have had for many years..I have never used them....much of them I picked up in junk stores, I cant remember when. I have a number of skillets, griddles, and dutch ovens, mostly Wagner. They look in very good shape with a good black finish...some rust, not much. My question is do I need to re-season or can I get by with a simple cleaning as in boil some water in the skillet/dutch oven, dry, and top off with a proper oil???...The reason I ask is, I have no idea what was cooked in or ever resided in these old cast iron pieces over the many years I'm sure they have been around. . Don't know if anything that might have been harmful to the human body was ever put in them. Should I worry about that??..What's the best process to get started. I can't wait to cook some cornbread and biscuits like my grandmother used to do over her old wood cook stove in south Georgia.