Marks on print, unsure what is causing it

[GCIIMessi]

Hi! I've been printing just fine, then all of a sudden today I'm getting these marks on every single print. I've tried all the maintenance options, cleaned the print head. Seems to be coming from a roller potentially, or around that area. Just so confused as it was perfect just last night. It's the lines either side of the white line on the right side of the green

 

[PeterBJ]

As the problem is only in green and not in red and green is made from cyan plus yellow and red is made from magenta plus yellow, I think the problem is in the cyan channel, which looks like the cartridge cannot deliver enough ink at the end of the printhead travel to the right. I suggest to try another cyan cartridge to see if that solves the problem.