Installed set of inks in Dec 2014 time frame with no issues and have been printing just fine. After taking each cartridge out and gently rocking it back and forth, the one position (light magenta #5 shade) will not print. Tried repriming it but still not good. It appears to me that the cart won't hold a prime as it keeps an air pocket at the nozzle end even after pulling a fair amount of ink out through it.
I filled that slot with piezo flush cartridge and it works fine. That will print red fine.
This makes me believe that I have a bad cartridge.
Is there any suggestions or anything else I can try?