These surfaces can be cleaned using standard window cleaner. You'll want to note that you should never submerge a kettle in any type of liquid. The kettle has electrical components inside of it that can short out if wet. Kettles are designed to be wiped out with a clean cloth after each use. Should you have a kettle that gets burned-on oil stains, you can order the kettle cleaning kit, which will allow you to clean it to near-new conditions.