Apparatus for cleaning and disinfecting sink drains and overflow holes. The apparatus includes: a cleaning fluid dispenser having a cleaning fluid reservoir, and a dispensing mechanism with a fluid dispensing port. Cleaning fluid is forced from the cleaning fluid reservoir out via the fluid dispensing port. A flexible tube is attached to the fluid dispensing port, and a support wire is affixed at its proximal end to the inside of the fluid dispensing port. A cylindrical brush is attached to a distal end of the support wire, which runs inside the tube along its length from the dispensing port to the cylindrical brush, so the tube can provide cleaning fluid to the cylindrical brush. The flexible tube is durable under repeated use, sliding in and out of the overflow hole and the drain of a sink, while the wire prevents the tube from kinking.