I have a Xerox XC540 that has started making what I call "muddy" copies. There was some toner on the bottom cover just below the drum. The drum also had some toner on it. I carefully cleaned the drum off, but the next copy was exactly the same.

Is the wiper that cleans the drum located within the drum assembly?

Is it time for a new drum?

(A second, new toner cartridge did not improve the quality any)