The water tank cleaner performs deep automatic cleaning to keep the toilet clean and full of aroma.. The automatic water tank cleaner has a built-in cleaner inside the bear-the cleaner block will slowly dissolve and penetrate into the small holes, and you can use it for a long time without having to replace it frequently. The cleaner automatically enters the water tank and is continuously provided with the cleaner. Water flows from the tank through the inner wall of the toilet to keep it clean, effectively reducing water flow, and even eliminating the need for brushes. The toilet cleaner bear will automatically dissolve and dilute-creating your comprehensive cleaner-no need to carry a bottle of cleaner and toilet brush. The easiest way to do deep cleaning and make your toilet feel like new.