If you've noticed white flakes in your tea or coffee, it's time to descale your electric kettle. Lime scale is a result of boiling water with high levels of calcium. Although it is not harmful or toxic, built-up lime scale can clog the spout. Fortunately, you don't need any special cleaners to get rid of lime scale.
Add 1/2 cup of white vinegar to the kettle.
Pour 2 cups of water into the kettle.
Boil the vinegar and water mix for a few minutes.
Pour out the mix and rinse the kettle with clean water.
Repeat this process if all the lime scale was not removed. Wash the kettle with soap and water before its next use.