Back Of The Paper Is Smudged - Canon MG3500 Series Troubleshooting 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 borderless printing, duplex printing, or too much printing, the inside may become stained
with ink.
53