If you end up with the white lime sediment in your tea kettle, here is how to remove it without chemicals.
1-1/2 cups apple cider vinegar
1-1/2 cups water
3 tbsp salt
Combine ingredients in the teakettle, and bring to a boil for fifteen minutes. Allow to sit in the kettle for the day, or overnight, empty remover solution then rinse well with water before using.