Ricoh 1000N printing problems

[stealthsound]

I'm starting to get small horizontal lines appearing on my prints. The laser printer is only a year old and is hardly used that much. As a matter of fact, it still has the original ink cartridges with only the Cyan running a bit low.

I've cleaned it out in accordance to the maintenance tasks in the manual so I don't know what else to look for to solve the problem - figures that it would be just a month out of warranty - bugger.

Anyway I've attached an image link to show the problem. Other then that, it prints perfectley fine.

Here's how the prints come out:

http://img163.imageshack.us/img163/7174/shitnd5.jpg