PIXMA MX922 PGBK black ink printing double

[garygulbransen]

Win 11 wi-fi, no errors, print head removed and cleaned, replaced cartridges, etc etc and as I said my printout looks exactly like API posted above. Wavy lines through the middle of the black grid. The workaround suggested by someone is to print your documents in, in my case Dark Lime...evidently that eliminates the printer using the large black cartridge (labeled PGBK) and solves the problem. I did not clean the timing tape.

[awalsh6611]

Thanks DerrickL.  I also saw multiple offerings on Amazon for generic replacement and am contemplating whether or not to spring for one.  My MX922 is a backup of sorts, so it's not critical that I can print good black text on it.  I can still print good photos (at least last time I checked after the blurring and double printing began) and the scanner works fine.