The typical stuff applies:
Use Canon Inks
Good quality paper
Check for obstructions or jams
Deep Clean and perfrom a print head alignment
"Every other line"?
May want to remove and uninstall all drivers, then reinstall using the latest driver available for your OS.
If this doesn't help, the device probably needs service / part replacement.
Bay Area - CA
~R5 C (220.127.116.11) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw ~Pixel 8 ~CarePaks Are Worth It
Cleaning the encoder strip may help with this issue. Please visit the following link for details about this procedure.
Thank you for the suggestions.
As mentioned, I had completed, several times all of the on machine maintenance operations.
I have completed the various manual cleaning operations as well. No improvement has been noted.
I have concluded that repair parts would be needed, probably at least print head(s) So, given the time (my labor) and money involved I opted for a replacement machine.
I bought an MF644Cdw for a good price, in some ways not as functional for my purposes, but more solid.
12/05/2023: New firmware updates are available.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.