Canon MultiPASS C3000 User Manual page 187

Disconnect the power cord from the MultiPASS C3000 before
cleaning.
Open the printer cover by grasping the paper guides and lifting.
Use a clean, soft, dry, lint-free cloth to remove any ink or paper
debris from the printer’s interior, especially around the platen.
Make sure not to touch the cartridge.
PLATEN
Check the small black rollers. If they are dirty, clean them with a
soft, dry cloth.
When finished, close the printer cover, and plug the MultiPASS
C3000 back in.
Chapter 9