After the 3rd attempt everything clean.

After 4 years of operation Canon MP610 my I realized that was blocked from the print head to a large extent the color yellow. A new printhead of the 80 I did not want to buy the same. So I tried to clean himself first with ethanol and water Spüli the printhead, but after several attempts brought little.
Skeptical, I read the recessions on Liqui-Jet nozzle cleaner and came to the decision, all cheaper than a new print head.
After a few days the product incl. Pipette and instructions came in bubble envelope to me, I had to find the light ran out the bottle.
After the first 24 hours soaking, a success was visible, it was already more yellow watch the nozzle pressure test. Soak So again 24 hour, but then the check now was as good as no yellow watch more. No matter how many times I am the printer operated nozzle cleaning ...
Days later, I read it on a 3rd attempt to arrive, and softened the print head again for 36 hours in the solution and dripped by pipette this time also from above (on the opening where the cartridges are used) to the print head slightly of the top solution. After 12 sins I took the pipette and put them on the opening of the respective color and pumped repeatedly air clean until it expanded slightly. The whole again I got 2-3 times in a 36-hour procedure.
Lo and behold, the color yellow shines in new splendor. Everything like new!