3. Lime Scale: Sometimes when we need a cup of tea, the kettle can be lined with lime scale. This doesn’t bode very well when guests visit for a cuppa! So, to alleviate the problem, simply add one part brown vinegar to two parts hot water and leave in your kettle for 50 minutes. Then, rid your kettle of the cleaning mixture, add water and put it on to boil to remove any leftover lime scale.