My GX2020 is printing with lines in the magenta. I did the regular cleaning 2 times and the deep cleaning once. The printer is less than a year old. I posted this yesterday but couldn't find it to see if anyone commented.
I found that if I change the paper type to high gloss when printing a photo I don't get streaks. Unfortunately that option is not available in other apps with a picture in the document such as MS Word.