Most HP Printers have a quite advanced cartridge cleaning system, but it can’t be operated from the printer, but from the software. Check out how to do it:

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They’re cleanned pretty much the same way as any other inkjet cartridges, but try to avoid letting the cartridge contacts under water for more than 2-3 minutes, or you’ll have cartridge recognition problems:

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Here is a good video showing you how to clean a inkjet cartridge (the cartridge in the video is a HP, but as they all are similar, the instructions will work for any ink cartridge). …

This kind of stupid video shows you what happens if you put your inkjet cartridges in the microwave and forget to take them out before turning it on:

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Here’s a demo video of a nice device which is designed to test ink cartridges. It can perform electronic and print tests for most inkjet cartridges. The system also enables you to convert and reset …