A bladder for bringing and engaging a cleaning cloth into contact with a blanket cylinder. The bladder has a molded (extruded or machined) shape optimized to, when inflated, provide a contact surface elevated above the remainder of the bladder. When the bladder is not inflated, the contact surface or central portion remains elevated above the reminder. In addition, the device has improved contact characteristics, providing significant improvement in the consistency of contact surface with less sensitivity to pressure fluctuations between the cylinder and the bladder over prior art.