Oh that is an interesting read! It makes me wonder....
Our HP printer recently appeared to suffer with a clogged printhead. I'd just bought new inks to put in it. I tried to clean it to no avail and as far as I could see, no inks came out of the new cartridges. My daughter then moved home with her slightly newer HP printer that uses the same cartridges. That worked briefly until the black ran out. On adding a new black, all colours suddenly stopped working.. and the black didn't work either even though that was brand new out of the packet. Putting in the newer cartridges, it seemed they were empty! I found this really hard to believe since I had seen no ink at any point - I know it can go into a maintenance pad, but surely I'd have seen something? Can it get past a completely clogged printhead?
The original HP printer is now destined for the tip. As for my daughter's, I have been reluctant to spend another £50 on ink and possibly not see any results at all. I will see what she wants to do. This article is the nail in the coffin for that printer as far as I am concerned.
I have bought an Epson ET 8550. It arrived this week. I've only run a few test prints so far, but I'm really happy with it. I have my Canon Pro 1 for pigment inks, but I am really pleased that I can print and not worry about ink costs with the ET 8550. It's liberating.
Edit: I forgot to add that my daughter had previously used non OEM inks. So, did it see that and stop everything from working?