Unplug the power cable to power off the printer. The pushbutton switches off.
Open the printer cover.
Remove the cap from the cleaning pen.
Gently apply the pen to the print head, moving it from left to right for a few seconds.
Replace the cap on the pen.
Close the cover.
Wait a couple of minutes before using the printer until the cleaning product has fully evaporated.
Reconnect the power cable and power the printer on. The pushbutton turns on.