I’ve only just recently starting seeing this issue (see photo below). I print about 10-15 8.5"x 11" full color photos per day in my office so I use a fair amount of ink and the printer is never idle for more than a weekend.
If I do a head cleaning cycle and nozzle check, it shows as fine and then the first print right after will (usually, not always) be fine, but then the next photo shows the banding and if I then do a nozzle check it shows some missing lines. So the head cleaning works for a print or two, then it’s back to the banding and showing missing lines with the nozzle check.
Any ideas what I can do to try and fix this?