HP/Canon - Printhead cleaning -- ink tank/printhead permanently installed (modular)

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Clean the printhead

Alcohol should only be used as a last resort as it can damage the printhead seals! If you use alcohol, 3 water flushes are needed to purge the printhead fully!
Recommended circulation times: Alcohol: 5-10 minutes. Without alcohol: 15 minutes.
The water will get lighter as the ink breaks down, this is normal. If your clog is stubborn, an ultrasonic cleaner may help break it down.
Put the printhead in hot water. Repeat until the printhead is reasonably clean. Change the cleaning water frequently.
Wipe the printhead contacts and nozzles by hand to ensure these areas are dry.
Before reinstalling the printhead, let it air dry for ~3-4 hours. Using a fan may speed this step up.

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