I am using refilled cartridges for the Photo-smart 6520 all in one wireless (mainly) . I am trying to get the printer to not give me problems due to the chips being read by the system and knowing that they are previously used. I took the cartridges out last night and also the print head as described. There was a WHOLE LOT OF INK (mainly black) in several places inside the printer that I did not like. Even with the print head out, I had to continue to move the carriage and clean "leaked" drops of mainly black ink from the path on the metal part. I also had to carefully clean it from the white rollers. I cleaned so much ink from the print heat and it seems that the colors side it pretty much clean. It is the black side that concerns me. From underneath the print head, that nozzle seems to still have some dried ink there. I let it dry overnight, am in the process of a hard reset, and will be plugging it in again and inserting the cartridges during that process. I will try and check back for comments.