I'm running into a similar issue with my printer as well. I had to replace all the colors because they all ran out nearly the same time. I used nothing but Xerox brand but I'm now seeing blotches of color all over any printed page.
I'm looking for a way to clean the thing but every Xerox forum I go to says "get a tech", which is unreasonable for a printer honestly only had to go through one ink change. What happened to building quality products? I guess I paid a crap ton of money when I should have just purchased a POS HP printer and thrown it away whenever it acted up.