Disclosed is a system for cleaning a print media sheet and, more particularly, for cleaning a specific portion of sheet that is less than the entire length of the sheet. A device moves a cleaning roller between standby, cleaning fluid receiving and cleaning positions. Timing of cleaning roller movement into the cleaning position is controlled to ensure proper positioning of the cleaning roller with respect to the sheet during cleaning. In the cleaning position, the cleaning roller rotates so as to clean only the specific portion. In the cleaning fluid receiving position, the cleaning roller rotates to receive, from a cleaning fluid dispenser, a predetermined amount of cleaning fluid. Optionally, a retractable shutter can be selectively retracted to expose an opening in a sheet transport path guard and, thereby allow the cleaning roller to move into the cleaning position.