Scrub Lightly:

Use a soft sponge or brush to gently scrub any remaining stains or residue.
Rinse Thoroughly:

Rinse the kettle several times with clean water to remove any residue of the baking soda or cleaning solution.
Boil Clean Water:

Boil a full kettle of clean water and discard it to ensure no cleaning agent remains. Why This Works: Baking soda is mildly abrasive and effective at breaking down stubborn mineral deposits and dirt without damaging the kettle. It’s non-toxic, safe, and inexpensive.