Abstract: A toilet cleaner controller device for use in a toilet having a tank equipped with a fill device functioning after a flush to refill the tank with water to a selected level, with this toilet cleaner controller device having therein a reservoir adapted to receive a cleansing chemical able to be dissolved in water. The reservoir has an inlet connection enabling it to be connected to receive water from the water-supplying pipe of the fill device of the toilet tank during the procedure in which the toilet tank is being refilled after a flush. In this way a concentrated cleansing solution will be maintained in the reservoir. A valve is operably installed in the controller device, connected to receive concentrated solution from the reservoir. The valve has an outlet port, with the valve enabling the flow of concentrated solution from the outlet port to the toilet to be readily controlled.