The toilet cleaner is a solid containing detergent, fragrances, and antibacterial agents. You only need to put it into the toilet tank, the toilet block is dissolved in the water, and the toilet can be cleaned every time the water is flushed. The application of MikaZone™ Hydroxyethyl Cellulose (HEC) in toilet blocks mainly plays a role in slow-release, aggregation, and adhesion.