If you own a printer older than 2021, V3600 is likely your best bet. For anything newer, expect to pay for official service.
Trigger advanced cleaning cycles for the print heads that go beyond the standard maintenance menu. How to Enter Service Mode Canon Printer Service Tool V3600
The Canon Printer Service Tool V3600 is a powerful service-level utility useful for advanced maintenance, diagnostics, and counter resets. When used correctly by knowledgeable personnel and with attention to compatibility and safety, it can restore printer functionality and extend device life. However, it carries risks including warranty voiding, hardware damage, and waste-ink overflow if used improperly. Prefer official documentation, physical servicing of consumables, and authorized service providers for critical repairs and firmware operations. If you own a printer older than 2021,
If you are uncomfortable with the risks, consider these alternatives: How to Enter Service Mode The Canon Printer