The underside of the carriage must be cleaned daily. It may be necessary to clean it more frequently if any of the following conditions exist:
media has a high level of static charge
full bleed printing
media thickness value is incorrect (carriage is too high)
Equipment
Isopropyl alcohol (IPA)
Cloth-Poly Wipe 10cm x 10cm (lint-free)
When you clean the carriage underside you may need a light to evaluate its condition. Do not use a LED or Halogen (flashlight, smart phone etc). LED and Halogen light sources will cure the UV-based ink in the printhead nozzles rendering it useless. Use fluorescent bulbs or cover your light source with silicon glass or quartz..
Avoid touching the printheads.
Check for ink accumulation on the underside at the end of each day. If ink is left to long it will dry and be very difficult to remove.