Season the teapot before using it for the first time. Place it over a burner on the stove, boil water in it, then pour out the water. If you detect an odor in the pot, boil it again using tea instead of water.
Allow the pot to cool completely before cleaning.
Pour the liquid out of the pot when you've finished using it. Rinse with clean water and allow it to dry with the top off.
Polish the outside of the teapot with a soft, barely damp cloth.
Remove rust with a soft brush such as a baby's toothbrush. Fill the cast-iron teapot with used tea leaves and pour boiling water over them. Allow the leaves to soak for 20 minutes, pour out the leaves and rinse the pot.