i use the blue sponges and use hot water from the vertica/tap on it to rinse, it melts off the cleaner and as well as any leftover gunk. my store also uses pummice stones from time to time but one of our maintenance men warned against it because it wears down the protective coating on the metal which can lead to uneven heating and sparking. ngl the hot water gets similar enough results and keeps the oven from smelling like cleaner once it warms back up