The product is garbage as it does not work. Moreover, the "satisfaction guarantee " is also a scam!. I notified Green Gobbler that after using the product as per manufacturers instructions, the product made the drain clog worse! I requested the "satisfaction guarantee" as they advertise. The product was purchased on 鶹 but they claimed that it was sold by a "third party" so they will not honor the guarantee. They sighted that the 3rd party could have handled (contaminated ) the "sealed" bottle. What a joke! DO NOT BIY!!!!