We have HP Deskjet 660C Inkjet printer and lately we have noticed that the letters(espeacaly bold format) printed on page are crossed by thin ink lines.....it's appears so, but the lines are not very discrete. It seems like a powder does not want to hold on a paper surfice. After 20 min printed, i can still with my finger dragging over the letters smesh the ink around. We replaced the black ink cartrige hoping that may fix the problem, but it didn't. Also i do not know if this is something to do with the issue, but around the cartrige head seems to acumulate a little of ink. We also run cleaning and alinging utilities on software side on PC. In clean process it printed out lines which looked fine, because horizontaly it works. In aligning process it printed aligned bars good, but the bars are crossed by the thin ink lines. The less bold or smaller letter, the less ink lines crossing the letter appears.
I tryied my best to describe. ...if i did not do very good job, can anyone tell me how to better troublshoot the problem. Maybe someone has idea of what could be the problem?