I have changed the ink in my 9890 printer utilizing a set of inkjet mall cartridges. Prior to the change I replaced the ink selector unit. The ink change worked without a hitch but I am continually running into an issue with the Cyan and Vivid Magenta channels.
Each morning I have either the Cyan channel or the vivid magenta channel missing dots in the nozzle test. I perform a ink channel pair cleaning and it resolves itself for the rest of the day. The next morning I perform a nozzle check and either the Cyan channel or both the Cyan and Vivid Magenta channel are missing dots. I then do the cleaning and it is resolved.
I have removed the ink cartridges one at a time and this does not seem to help.
On two occasions I have done an powerful cleaning on the pair to see if that would have some long term results, but no.
I have not had issues with any of the other channels.
Any ideas on why this is occuring?