@Iessei, Welcome to the HP Support Community!
Thanks for reaching out about your query regarding your HP 555 plus!
We're thrilled to have the opportunity to assist you and provide a solution.
I understand that you have the same issue as the other customer but don't worry, I'm here to help!
Please refer to this link for troubleshooting steps for print quality issues.
Let me know if this helps!
Take care, and have an amazing day!
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Regards,