My HP Officejet 6210 printer is not printing quality images despite changing the ink cartridge--what do I do? -

I am wondering if there is something that needs to be cleaned. Pictures in documents have lines through them.

Sounds like you need to clean your print heads. You can find more information and instructions here: http://www.castleink.com/_clean-print-he…

Check your printing setting in properties and make sure that it is set to Normal or High Quality...