We recommend KOHLER® Drain Treatment for for slow or blocked bathroom sink drains. Follow the directions below as needed.
Remove as much standing water as possible. Pour entire contents of the package into the clogged drain. Allow to work overnight, if possible. Flush with hot water.
Add 4 ounces of product for each inch of diameter of drain pipe. For best results, add drain cleaner at a time of low water use, such as overnight. Continue daily until system flows freely, then add every other week as a preventative maintenance.