Canon ip4000 printing problem

[Martin ©¿©¬ somewhere]

Hi
These last few day when I print, the paper is picking up ink along the
leading edge, yesterday black, today yellow.
It sounds like the print head/carts is rubbing the paper as it comes
through. Yesterday it occured during duplex printing,
but single- sided was OK.
However, today it is happening on single-sided also
Also having probs printing black text on CDs
What would be causing this?

The page has black text with colour highlights and the colour
highlights arn't printing
I have cleaned, deep cleaned, nozzle cleaned, bottom plate cleaned and
changed carts all to no avail

Is the printer on it's way out?

 

[measekite]

it is probably from the generic ink that has been accumulating under the
printhead.