About Product:1, Open the cap and pour generous amount into the drain. (If the water overflows the inlet, please remove the water outside the inlet. It is best that the water is lower than the inlet. Then pour the cleaner powder).2, Slowly pour 200 ml water into the drain (It is best to use warm water, about 45 degrees)3, Wait for about half an hour, rinse with plenty of water to dredge the pipe.4, If the drain still has clogs, repeat steps 1-3 if needed.