Wash the Dutch oven with warm water and mild soap
Scrub off any rust, residue, or factory coating
Dry it completely with a towel
Heat it on the stove or in the oven to remove all moisture
Apply a very thin layer of cooking oil to the inside and outside
Wipe off all excess oil so the surface looks nearly dry
Place it upside down in an oven at 450°F to 500°F
Put foil or a baking sheet on the lower rack to catch drips
Bake for 1 hour
Turn off the oven and let the Dutch oven cool inside
Repeat the oiling and baking process 2 to 3 times for a stronger seasoning
After use, clean with hot water and a soft brush
Dry immediately and apply a light coat of oil after each wash