Can damage the print head!

After the printer printed unclean and could not be improved via the integrated cleaning functions, I discovered that the print head at the bottom was dirty with ink residues. This I wanted to eliminate the spray.

The application notes on the Spray Can, in particular "components easy spray", and property description giving the impression that you can not go far wrong. Nevertheless, I considered myself as a precaution to descriptions from the Internet:
I removed the ink cartridges and the print head from the printer and carefully sprayed on top of the mesh-like opening points, through which the ink is sucked from the cartridge and the bottom of the nozzle. And I kept the pressure head on a plastic tray, taking care not to touch the electrical contacts on the printhead back with your hands or spray liquid. Then I let the printhead in the liquid in the tray are approx. 8 hours.
Since then still had ink remains on the side of the nozzle, I repeated the process twice more. In particular, ink remnants of pigmented text printing ink seemed hardly replace. But much more serious was that solved part of the plastic to the nozzle area around! On the long sides of the nozzle area are small depressions. From these, the coating bulged out what I had initially held still for ink residues. Also small pieces of plastic coating solved on the short sides.

I wanted to try to save the printhead then bought and isopropyl alcohol, which is still visible sparked a lot of ink. But ultimately the printhead was yet over and the printer reported only the printhead defect. So I was left only, expensive to buy a new printhead (Printer initial purchase worth not yet).

My conclusion: Use better the proven isopropyl alcohol to take (as a spray or simply from the pharmacy), which I had from the beginning. It does not damage components, the color dissolves very good and evaporates without residue.