A:Answer Use extreme caution when cleaning the quartz heating elements. Allow the oven to cool completely, then gently rub a soft, damp sponge or cloth along the length of the heating element. Do not use any type of cleanser or cleaning agent. Let all surfaces dry thoroughly prior to inserting the power plug into a power outlet and turning the oven on. There will, undoubtedly, be some residue that can't be washed off and will need to burn of with continued use.