Trying to troubleshoot this laser printer. The blue color drips dots now on all printed materials. Already did the two types of cleanings: Clean Fixing Assembly amd Clean Feeder. Clean ITB button refuses to start, so we are unable to get that going. Does ceylon blue tomer cartridge need changing periodically? It is leaving crumbly blue bits all over inside the machine now after the two cleans. Tried to remove the 3 cartridges and leave black inside only, but there must be a sensor telling the printer not to function due to the 3 missing cartridges. And naturally, the 3 years warranty just expired. Thanks in advance.
The issue you are describing would usually mean the toner is not seated properly or it is damaged and leaking. You can try removing all of the toner cartridges and checking the inside of the printer for any loose toner powder that you can wipe up with a damp cloth or you can try replacing the cyan cartridge to see if it resolves the issue.
If it continues to have issues, it would mean the printer needs service. You can log into your MyCanon account to view any available service options.