For best results clean toilet bowl thoroughly with a toilet brush. Flush toilet, when water level is low place jar inside tank as shown (cap up) in the right back of the tank. TO REMOVE: When water is no longer blue, flush toilet and remove the jar upside down. Allow water to drain and discard the jar in a plastic trash bag.
Bowl Fresh 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.