Most customers do not want to fiddle around with the machine like this, thats why the easiest solution often is the one suggested to the customer.
Xerox do not assume that you are willing to change small parts, thats something you have to decide by yourself.
Glad it worked out for you though :)
Sorry the delay but I was trying to get more information from this model. From where I'm, this model is not exist so is difficult to get more info. Anyway it's look like other similar where the blade is glued inside the DRUM. I can not confirm this.
You have nothing to lose so you can try to open it.
Sorry I can't be more helpful.
Like Kimzy said, cleaning is not good idea. Besides, you are always seeing the ghost from last copy. Could be the discharge system that is not doing its work like Kimzy said.
The only way is buying a new DRUM. Sorry about that.