Back Of The Paper Is Smudged - Canon MG2900 series Online Manual

Back of the Paper Is Smudged

Did you confirm the paper and print quality settings?
Check1
Print Results Not Satisfactory
Perform the Bottom Plate Cleaning to clean the inside of the machine.
Check2
Cleaning the Inside of the Machine (Bottom Plate Cleaning)
Note
• When performing duplex printing or too much printing, the inside may become stained with ink.
625