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To clean the outside of your kettle, use basic dish detergent. Wash the outside with the dish soap and then wipe it down with a damp cloth. Try not to get any dish soap inside the kettle.  Clean the outside every week or so. Because of the heating element, you cannot place your electric kettle in water. If you have a stainless steel electric kettle, you may want to polish it to keep it shiny. To make it shiny, use olive oil. Place some oil on a soft cloth and rub over the outside of the kettle. Rub gently to make sure you don't scratch the outside surface. The interior of your kettle can get build up with frequent use, especially if you live in an area with hard water. This can lead to flakes in your tea or coffee, and cause the kettle to work slower. To keep your kettle working properly, clean it every few months.
Clean the outside with dish soap. Polish with olive oil. Clean your kettle often.