How can I remove & solve green color with printing time problem?

I have a Canon Pixma MX882 Wireless Inkjet Office All-in-One. Its design looks nice. It can be use for both home and office. At first when I buy this printer it prints text & photo well but recently I facing too much problem. Now when I print an image it shows a green color line on the image. Also it takes much more time to print any image.
How can I remove & solve green color with printing time problem?
