Its a little bit late to help but for future users with the same problem. If the following happens. Nozzle check that is unsatisfactory - clean - nozzle check - worse result - deep clean - worse result (colour completely dissapearing), don't keep cleaning.!!! It will get worse. You may have not used your printer for a while and the ink has dried on the head. What you need to do is a complete a print head flush. First make sure your ink tanks are at least 1/3 full. This process uses 10% of your very expensive ink. Also, you need to ensure that your Maintenance cartridge MC-32 is not already full. If it is, I would replace it as I just managed to complete the flush before my maintenance cartridge warning came up. When you have established this is OK to proceed go into the maintenance menu and look for 'Replace Ink in Print Head'. This process takes around 9 mins and must not be interrupted. When completed you need to not touch anything for a minimum of 1.5 - 2 hours. I actually left it on stand by overnight for the following reason. When flushing, the process generates a lot of air bubbles in the ink tanks. If you try to print at this stage you will continue to get a poor nozzle check result due to this air content. If you leave for longer than 2 hours this will allow the air to rise and purge from the ink. The next day my nozzle check was perfect. Following the maintenance instructions Exactly and a little patience and you stand a very good chance of getting your colours back in full. Rather than Canons unfathomable, poorly compiled instruction manual I resorted to chat GPT for the first time in my life and it was spot on! I got all of the full colours back like new. If this doesn't work you probably need a new print head but I suspect this process will do the trick. Good Luck and Hope it helps.
