Clean the printhead | HP® Support
https://support.hp.com/us-en/document/ish_1677107-7687944-16
WEBIf your print is streaked or has incorrect or missing colors, the printhead may need to be cleaned. There are three stages of cleaning. Each stage lasts about two minutes, uses one sheet of paper, and uses an increasing amount of ink. After each stage, review the quality of the printed page.
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