Hi, Thanks for your answer.
No the colour doesn't come off on your fingers and the paper is quite warm to the touch so I don't think it is that, the problem started a few weeks ago and has got steadily worst I did approx.. 30 pages of printing yesterday and by the end the whole page was discoloured but also with streaks going all down the page. I turned the printer off over night and it seems better today but still doing it a little. What does the imaging unit do? and how often does it need replacing? Thanks.