Very good. Cyan (C, or light blue) is obviously worst affected.
Check your ink levels, and think back as to when you last replaced cartridges, esp. the Cyan color. (Let me know, please.)
Then also, if ink levels are not low, you can do several Head Cleaning cycles (from the same Maintenance menu where the Nozzle Check is listed), and esp. if possible, head cleaning cycles for just the color Cyan, if that choice is possible. Separate each Head Cleaning (Cyan if possible, all colors if not) from each other with about an hour or two of quiescence, during which the printer will be unused for anything but left turned On. This allows waste ink to soak into the printhead and clear up any clogging that may be there.
If ink levels esp. in Cyan color are low, or almost empty, then of course the cure is to replace the Cyan cartridge.
Let me know what you find out, please. Thanks.