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My MX 870 won't print the magenta ink. I've tried several regular and deep cleanings from the setup menu but no luck. Can I manually clean the print head? If so, what steps do I need to take?Thanks

I have an MX 870 printer that dosen't print the magenta ink. I've tried the regular cleaning and deep cleaning, through the setup function, on the printer several times, but no luck. Is ther another way to clean the print head or do I need to replace...