Xerox Phaser 6510 User Manual page 106

Maintenance
6. Remove the cleaning rod from inside the printer.
7. Insert the cleaning rod into one of the four cleaning holes until it stops, then pull out the rod.
Repeat this two more times.
8. Repeat the procedure for the holes in the other three slots.
106 Xerox ® Phaser ®
User Guide
6510 Printer