In order to remove limescale deposits from around the lid of your kettle we would recommend a solution of one part white vinegar and two parts water.You may need to soak a kitchen towelin thesolutionandleave on the marksif theyhave beenleft for alongtime.Onlyuse a nonabrasive cloth to remove, such as a microfibre cloth.We would not recommend most proprietary descalers as these can often damage the paint on enamelled kettles.To avoid a build-up, particularly in hard water areas, do this monthly after you have descaled your kettle.