Abstract: Apparatus for cleaning internal surfaces of water closets ("WCs") and similar fixtures includes a container to be placed near the fixture to be cleaned. A brush is stored in a lower section of the container, and it is removed from the container to clean the WC. A water supply system in an upper section of the container includes water conduits and a flexible tube which is retractably mounted on a rolling up device. Water flows from the flexible tube through the brush handle to an impeller which rotates the brush, and the water sprays the bristles to keep the brush clean and to prevent the formation of deposits on the bristles. When the brush is inside the container, a cleaning rod protrudes into the bristles, and the brush is rotated to clean its bristles further.