I have a Canon MG 2220 printer.
I have having problems with my printouts having horizontal bands across them.
I have cleaned heads using CUPS.
I also just physically cleaned the printer heads.
There was a lot of ink and some was pooled on the bottom of printer.
Picture of printout is here.
https://www.dropbox.com/s/4i8eveduagvoryz/Printer_Banding.png?dl=0