Step3 Clean the print head again.After cleaning the print head again, print the nozzle check pattern and check the result.If it still does not improve, go to the next step.Step4 Clean the print head deeply.After cleaning the print head deeply, print the nozzle check pattern and check the result.• For Windows:Clean the print head deeply• For macOS:Clean the print head deeplyIf it does not improve, turn off the printer for more than 24 hours without disconnecting the power plug, and go to the next step.Step5 Clean the print head deeply again.After cleaning the print head deeply again, print the nozzle check pattern and check the result.If it still does not improve, go to the next step.Step6 Request a repair.If problem is not resolved after performing print head deep cleaning twice, the print head may be damaged. Contact your nearest Canonservice center to request a repair.For details on printing the nozzle check pattern, print head cleaning, and print head deep cleaning, see If PrintingIs Faint or Uneven.493