Canon MG5700 Series Online Manual page 190

For B (lines are missing or horizontal white streaks are present) in the pattern C or pattern D, or
in both patterns:
The cleaning is required. Select Also B, then press the OK button.
Select Yes on the cleaning confirmation screen, then press the OK button.
The machine starts cleaning the print head.
Cleaning the Print Head
Note
• The total number of sheets printed so far is shown in increments of 50 sheets on the printout of the
nozzle check pattern.
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