how to clean print heads on a Canon i960?

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another idea: are you sure the printer needs cleaning? i.e. did you tun the test and did you find clogged nozzles? I think if all nozzles are clear but your colors are still off, the problems is somewhere else, a corrupted printer profile or something like that. Have you tried printing from a different computer? are you sure you did not mix some ink cartridges (like I did)?

Good luck!