For best results, clean toilet bowl thoroughly. Remove toilet tank cover. Hold bottle upright over tank & pull out clip. Remove cap. Hang bottle upside down on inside tank wall away from moving parts. When blue color fades, add a new Ty-D-Bol® Liquid.
Ty-D-Bol In-Tank Toilet Bowl Cleaners inactivate minerals in hard water so the ingredients can loosen, disperse and suspend soils for removal. Use in toilets that are flushed on a regular basis or at least once per day.