Pro 10s woes

[pxl8]

My Pro 10s has decided to stop printing yellow and red and running a nozzle check gives varied results, sometimes it looks clogged, sometimes it look great, and sometimes one more ink is just missing. If I try and run the alignment tool more often that not it says it's clogged.

So I bit the bullet and bought a new printhead but all the problems remain.

What can I try next?

 

[Indianajones]

Can I ha e your old printhead? And if I were to guess your problem is the little pads that the printhead sits on in-between prints. They are probably dirty and smudge ink onto the bottom of the printhead.