A self-cleaning oven is designed to produce extremely high heat to clean the oven interior. When a self-cleaning oven cleaning cycle runs, the high heat generated by the oven incinerates any liquid or food particles or pieces remaining within. The white, sometimes gray, residue that you see when you open the oven door after the self-cleaning cycle ends is a byproduct of the process – ash. Typically, removal of this residue takes little effort beyond rinsing the interior surfaces.
Open the door on your self-cleaning oven after the self-cleaning cycle ends and the oven has cooled completely.
Dampen a lint-free microfiber cloth.
Wipe the oven interior with the cloth to remove the fine white or gray ash. If an area of residue won't wipe away, dampen a fresh cloth with undiluted distilled white vinegar and rub at the spot, then rinse away the vinegar thoroughly with another damp cloth. If you still can't remove the residue, scrub the area with a slightly soapy, nonabrasive scrubbing pad, then rinse away the soap with a damp cloth.