My printer's model no is Hp 5610xi Office jet. I am using it from last a year. Before it was working good. There was no issue regarding the prints. But now it is giving a blurry printouts. There are small spots on the pages. I had changed the cartridge a couple of days before. It is new cartridge and full of ink. The printer has no issue. It is working fine and smooth. But the quality of printouts is not so good. It gives a blurry result. What can be problem. Help required.