Add water between Min and Max volume, and don't let kettle work on empty state. the bottom of kettle will burn yellow. The surface of the stainless steel oxidized in the air at high temperature., Hand

MEISON Electric Kettle, 1.7 L Double Wall Food Grade Stainless Steel Interior Water Boiler, Coffee Pot & Tea Kettle, Auto Shut-Off and Boil-Dry Protection, 1200W, 2 Year Warranty(Blue)