The present invention relates to an attachment for a pressure washer wand comprising: a plate having a front end, a rear end, top end, and a bottom end; a first wheel connected to the front end of the plate; a second wheel connected to the rear end of the plate; an angle bracket connected to the plate; a clamp connected to the angle bracket; and optionally a spray wand connected to the clamp. One of the later flanks or components of the flank or of the seat body is fixed on a structural vertical member of the public transport vehicle. A power-ring subassembly is supported within the base housing portion, and has a central aperture defining the boundaries of 3D interior volume, and adapted for supporting a plurality of electrical receptacles and one or more electronic circuits, which are electrically connected to the power supply cord. Once the weakest cylinder has been balanced, the control action is then directed to increasing torque of the new \u201cweakest\u201d cylinder. The method includes transporting a portion of a cleaning tape over a transducer head under a first set of conditions, the first set of conditions associated with a cleaning process of the transducer head, and transporting the portion of the cleaning tape over the transducer head under a second set of conditions, the second set of conditions associated with a writing process. In this way, possible inefficiency and premature closure of blocks in the pool can be avoided.