My Canon MG6250 has started making strange "colour stripes" on all photos.
Printing the "Nozzle check pattern", reveals the below strange problem in the topmost Cyan pattern, where the top and bottom parts of the pattern have vastly different saturation/intensity.
Does anybody know what could cause this? And even better, how it can be fixed? 
I notice that there also seems to be a smaller problem with thin white stripes near the top and bottom of the patterns. This problem seems to manifest itself across all colors, but are most visible in the BK pattern.
Any ideas for this as well?
(BTW. I have already tried both the Deep head clean and the manual head adjustment - both to no avail whatsoever)
