Periodontal cleaning device, comprising: - a cleaning head having a fluid outlet for releasing a cleaning fluid and a suction member, made of soft, resilient material, for suction of a waste fluid, wherein the cleaning head is configured to be applied to periodontal areas of a subjects mouth, more specifically on the crevices between the teeth and the gums onto pockets that require cleaning; - a cleaning fluid source (104, 206), connected to the fluid outlet via a fluid feed line; - a controllable suction means connected to the suction member via a suction line; - controllable fluid feeding means for controlling a flow of the cleaning fluid from the cleaning fluid source (104, 206) to the fluid outlet; - a control unit, the control unit being arranged for - controlling the controllable suction means in generating a vacuum pulse in the suction member; - controlling the controllable fluid feeding means in generating a cleaning fluid flow pulse in the fluid outlet in response to the vacuum pulse, and - controlling the controllable suction means in generating a subsequent vacuum pulse in the suction member; - wherein the fluid outlet for releasing a cleaning fluid is coaxially centered within the suction member characterized by - the control unit being arranged for pausing a predetermined time period (td 4) between the generating the cleaning fluid flow pulse in the fluid outlet and the generating the subsequent vacuum pulse in the suction member; - wherein the suction member has a suction cup, an inward curved collar and a passage for sucked in air and/or waste fluid; and - wherein the suction member is formed such that the cup is formed around the fluid outlet. - a cleaning head having a fluid outlet for releasing a cleaning fluid and a suction member, made of soft, resilient material, for suction of a waste fluid, wherein the cleaning head is configured to be applied to periodontal areas of a subjects mouth, more specifically on the crevices between the teeth and the gums onto pockets that require cleaning; - a cleaning fluid source (104, 206), connected to the fluid outlet via a fluid feed line; - a controllable suction means connected to the suction member via a suction line; - controllable fluid feeding means for controlling a flow of the cleaning fluid from the cleaning fluid source (104, 206) to the fluid outlet; - a control unit, the control unit being arranged for - controlling the controllable suction means in generating a vacuum pulse in the suction member; - controlling the controllable fluid feeding means in generating a cleaning fluid flow pulse in the fluid outlet in response to the vacuum pulse, and - controlling the controllable suction means in generating a subsequent vacuum pulse in the suction member; - controlling the controllable suction means in generating a vacuum pulse in the suction member; - controlling the controllable fluid feeding means in generating a cleaning fluid flow pulse in the fluid outlet in response to the vacuum pulse, and - controlling the controllable suction means in generating a subsequent vacuum pulse in the suction member; - wherein the fluid outlet for releasing a cleaning fluid is coaxially centered within the suction member characterized by - the control unit being arranged for pausing a predetermined time period (td 4) between the generating the cleaning fluid flow pulse in the fluid outlet and the generating the subsequent vacuum pulse in the suction member; - wherein the suction member has a suction cup, an inward curved collar and a passage for sucked in air and/or waste fluid; and - wherein the suction member is formed such that the cup is formed around the fluid outlet.