How do you get rid of brown spots in the bottom of a electric kettle?

To remove brown spots from the bottom of an electric kettle, fill it with equal parts water and white vinegar or lemon juice, then bring the mixture to a boil. After boiling, let it sit for about 30 minutes to an hour. Rinse thoroughly with clean water and wipe the interior with a soft cloth or sponge to remove any remaining residue. For stubborn stains, you can use baking soda as a gentle abrasive.