Hi Jerry, you can use vinegar to get rid of the limescale in kettles and on surfaces.
Fill the kettle with an equal part solution of water and household vinegar and let this soak for an hour. Once the hour is up, just boil the kettle. Then, empty the kettle and rinse it thoroughly. If you don't have any vinegar to hand, try lemon juice!
How to Remove Limescale on shower surfaces and doors
You are welcome!