Green Gobbler granular drain cleaner is an eco friendly choice for opening clogged drains safely and quickly. It will break down and liquify on contact any types of grease, hair, soap scum, femanine products and any kind of paper products blocking the line without damage to the pipe or the environment. Repeat treatment once per month for preventative maintenance. Directions: Pour 1 Single serve packet of granules directly into drain, use small amounts of water to activate the product and to rinse off the sink basin and drain covers, allow to sit 15 to 30 minutes then flush with hot water. If clog persists repeat treatment and allow to sit overnight, this will break down and liquefy years of build up due to soap scum, grease, oil , fats etc. Flush with hot water in the morning and drain should be completely clear. Repeat every few month for preventative maintenance. NOTE: In rare occasions you may experience an odor, This is not the product it is a non toxic odor caused by the breaking down of bacteria and organic matter that has been caked up in the drain for a long period of time. It means the Green Gobbler is working it's magic!!