Abstract: In one aspect, the present invention is directed to a dispenser of cleaning substance, the dispenser comprises: a container for storing the cleaning substance apart of the content of a bucket; conveying mechanism for conveying the substance form the container into the bucket; and an attaching mechanism, for attaching the conveying mechanism and/or the cleaning substance container to the bucket. According to one embodiment of the invention, the cleaning substance container is embedded within the bucket. According to another embodiment of the invention, the cleaning substance container is a separate entity from the bucket. The conveying mechanism may be adapted to convey liquid, solid objects (such as tablets), gas, and so on. Accordingly the cleaning substance may be in the form of liquid, solid objects (such as tablets), gas, and so on.