HP C6180 Ink is a new design which combines cartridges with the nozzle. People who know the printer devices must understand this kind of ink applies with to the foam thermal printer. Form the view of economy and durability, it probably is not the best choice. You have to change the nozzle once the ink is finished, because the nozzle has already combined with its cartridges. Maybe you are much confused why I introduce this ink. I will tell you that the seemingly wasteful device can lengthen the service life of the printer to some extends.
You should not complain but be glad to replace the nozzle after the ink is finished, so you do not have to worry too much about nozzle being clogged. Compared with the nozzle, the service life of the printer is much more worthy of concern. You can replace cartridges and the nozzle on a regular basis, however it is too expensive to replace the printer. Generally cartridges and nozzle are independent individuals, and the use of the nozzle would be a long time. It is the neglect on the replacement of nozzles that makes nozzles clogging after a long time of use. Thus the printing will be inconsistent and has mechanical wear, and ultimately affect the service life of printer. The most advantage of HP C6180 Ink is that the technology of its making is much mature, which reaches higher speed and higher quality print.
If you want to save the cost, you can refill it with the original ink or compatible ink while HP C6180 Ink has almost finished. You are not forced to replace the nozzle too often if you get the right operation. If I were you, I would see from a long term and let the cartridge and the nozzle be more efficient service for the printer. As long as the use of the ink is good for the printer, it is of high value to exist in the market.