If you still
see white or dark lines or missing nozzles in your printouts, even
after cleaning the print head several times, you can run a Power
Cleaning.
Caution:
Running a Power Cleaning consumes a lot
of ink, so you should run it only if necessary. Make sure each ink
pack is at least one-third full before running a Power Cleaning, or
it may damage the product. This feature uses a lot of ink and
causes the maintenance box to reach its capacity faster than
normal.