Canon says the only way to fix the air in the lines is to do an ink flush which uses a lot of ink and at some point will give you an error code that the ink pad is full and will stop printing. Once you find a way to remove the air from the lines (You...
I have had the same problems with air getting in the ink lines regardless of what I do. You can find ways to remove the air an reprime the printheads on Youtube. I was able to get all of the air out and found a way to keep it out so far. Canon says t...