HP Officejet 6950: How to clean the rollers / page smears.

After a while of using your printer, you may experience ink streaking down the page. this is caused by ink on the rollers inside of the printer, which is then transferred onto your print. The HP Officejet 6950 has a feature built into the printer that will clean the rollers automatically. It does this by running clean, plain paper through the printer and rubs it over the rollers, removing the ink residue. For severe ink streaks, you may need to repeat this process.