An oral cleaning and treatment device comprising: a cleaning unit comprising: a support body, two or more protruding members (14a, 14b), each extending outward from a support surface of the support body, and each comprising one or more electrodes (18a, 18b), the protruding members being spaced from one another; a radio-frequency generator arranged to supply one or more drive signals to or between the electrodes of the two or more protruding members, in accordance with a drive scheme, to induce an RF alternating field in an area around and/or between the protruding members, to provide an oral cleaning function wherein the drive scheme includes at least one of the information of the drive signals to be supplied to individual electrodes, the pattern of drive signals to be supplied to the total set of electrodes, the pattern of electrodes which is active at any given time, and drive signal amplitudes of different electrodes at different points across the support body; a controller for selectively configuring the oral cleaning and/or treatment device in at least two different modes, a first mode in which the oral cleaning and/or treatment device is arranged for generating an RF field with a first spatial intensity distribution, and a second mode in which the oral cleaning and/or treatment device is arranged for generating an RF field with a second, different, spatial intensity distribution, wherein switching between the modes comprises controlling a change in a position or movement pattern of the protruding members using an actuator, and/or comprises controlling a change in characteristics of the drive signals or the drive scheme; wherein each mode is arranged for generating an RF field with a different time-average spatial intensity distribution, over a defined time window; and wherein in the first mode, the spatial intensity distribution is more spatially homogeneous than in a second mode. a cleaning unit comprising: a support body, two or more protruding members (14a, 14b), each extending outward from a support surface of the support body, and each comprising one or more electrodes (18a, 18b), the protruding members being spaced from one another; a radio-frequency generator arranged to supply one or more drive signals to or between the electrodes of the two or more protruding members, in accordance with a drive scheme, to induce an RF alternating field in an area around and/or between the protruding members, to provide an oral cleaning function wherein the drive scheme includes at least one of the information of the drive signals to be supplied to individual electrodes, the pattern of drive signals to be supplied to the total set of electrodes, the pattern of electrodes which is active at any given time, and drive signal amplitudes of different electrodes at different points across the support body; a controller for selectively configuring the oral cleaning and/or treatment device in at least two different modes, a first mode in which the oral cleaning and/or treatment device is arranged for generating an RF field with a first spatial intensity distribution, and a second mode in which the oral cleaning and/or treatment device is arranged for generating an RF field with a second, different, spatial intensity distribution, wherein switching between the modes comprises controlling a change in a position or movement pattern of the protruding members using an actuator, and/or comprises controlling a change in characteristics of the drive signals or the drive scheme; wherein each mode is arranged for generating an RF field with a different time-average spatial intensity distribution, over a defined time window; and wherein in the first mode, the spatial intensity distribution is more spatially homogeneous than in a second mode.