Ink and other debris tends to accumulate on the bottom of the printhead nozzles and must be cleaned off on a daily basis and more frequently, if needed.
Equipment
Foam tipped swabs (3010105434)
Flush (3010106646 Flush UV 1 liter - use the 125ml bottle supplied with Accessory Kit)
Put some swabs into the small bottle with enough flush to cover the foam tips. Place the bottle near the maintenance door before you start.
This procedure assumes that the Maintenance Access door is still open from the previous procedure. If not click on Move Carriage and open the door.
Keep swabs clean prior to use. Do not dip a used swab in the flush solution.
Do not let the seam on the foam contact the bottom of the printhead. This can damage the printhead. See figure below.
A single swab is used to clean 2 printheads
Never use the same swab on two different color channels.
Never "scrub" the printhead with a swab as this will drag debris into other nozzles.