A scrubber assembly includes a scrubber support structure, an elongated scrubber element and a motor. The scrubber support structure is configured to attach to a windshield wiper. The scrubber element is movably attached to the scrubber support structure and extends between a first end and a spaced apart second end along a central longitudinal axis. The motor is mounted to the scrubber support structure and is engaged with the scrubber element to reciprocally move the scrubber element along the central longitudinal axis. A portable power source mounted to the scrubber support structure may provide power to the motor.