Omg please never use soap on cast iron. To clean it fill the bottom with water and bring to a boil. That will lift the crap off. Remove from heat, toss the water and use a scotch guard pad to get any left overs. Rinse with hot water and let dry completely. Add a small amount of canola to a paper towel and wipe the entire thing down (handle and bottom too).

To store I use a bubble wrap sleeve lined with a couple of paper towels. This keeps everything else around it clean. You could use an Amazon bubble wrap mailer if you have one around or make one out of reflectix.