Abstract: A extended-time release method includes the following steps: mixing water with the toilet cleaner to form an initial solution when water enters a bowl; starting release of the initial solution while water level in the bowl returns to normal; and continuing release of the initial solution after the water level in the bowl returns to normal, in which a mixed liquid of the initial solution and the water in the bowl is referred to as a primary solution; in the above method, the volume of the initial solution is not less than 10 ml; and the content of the effective ingredients of the toilet cleaner in the primary solution is not less than 2 ppm.