How do you clean a tea kettle?

Cleaning a tea kettle, especially to remove mineral buildup, can be done simply by boiling water in it.

According to the reference material, the cleaning process involves these steps:

1. Fill the kettle with water.
2. Bring the kettle to a boil.
3. Pour out the water.
4. If there is a lot of build-up, repeat the process more than once. The kettle should be sparkling clean afterward.