-To season your kettle for the first time, place it on the stove on medium heat and boil water in it, then pour the water out. Boil water in the kettle a few times to continue the seasoning process.
After each session, empty the Tetsubin completely while still warm. The heat will help evaporate any excess water. Remove the lid until the interior is completely dry after each use of your kettle.
-You may notice spots on the bottom of the teapot after about two to three weeks of use and you may also see water marks. This is normal and will help to prevent rust. In Japan, a natural mineral layer buildup from use is considered to be good for the health and to help prevent rust from forming.
-Please do not wash or scrub the kettle inside or outside with a sponge, detergent, brush or cleaning implement. Do not leave water inside for long periods of time.
-You may polish the surface of the Tetsubin with a soft cloth soaked with tea and squeezed until just damp, this will help to keep it looking glossy.