Canon BJC-4300 Series User Manual page 63

Press and hold
the RESUME
button for at
least two
seconds until
the printer
beeps twice.
The POWER light will blink for several seconds while the print head is being
cleaned.
Perform the print head cleaning only when you encounter a print quality
problem. Unnecessary and repetitious cleaning will waste ink.
If you execute the print head cleaning while paper is manually loaded, the
printer will eject the paper and then perform the cleaning.
4300 Chapter 4 Page 7