Defective 952 Ink Cartridges

[1sojourner]

Bought a combo package of color and black 952 ink and after numerous “clean print head” attempts the print quality is 70% b&w print lines (not character lines) printed and faint at times. Faint yellow at best (no other colors). 
Warranty ends May 2021. How do I get these replaced?

[Valsimot]

You probably have a printhead problem, the ink cartridge is just a plastic container that has liquid ink inside, the printhead is the part of the printer that "sprays" ink on the paper and creates an image.

The HP 952 Ink cartridges are like fuel tank on a vehicle, just for keeping liquid for other parts of the engine.