I have a Dl460 with over 500K copies on it. It has developed a ghosting and streaking problem. I found that the cause is in the print assembly. The cleaning blade was replaced 2 months ago athend has 12K copies on it. The drum has not been replaced, I can see the streaks on it and where the ghosting is originating. I'm going to replace both the drum and cleaning blade, if there is something I am missing, please inform me.