Canon PIXMA MG4200 Series On-Screen Manual page 151

(3) Press the OK button.
The machine starts cleaning. The cleaning will be complete when the paper is ejected.
(4) When the completion message appears, press the OK button.
The screen will return to the Maintenance screen.
Note
Press the HOME button to exit Setup and display the HOME screen.
If the problem is not resolved after cleaning the paper feed roller, contact the service center.
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