For many newer Canon printers, Canon has released an official "Waste Ink Reset Utility" or "Service Mode Tool" on their regional support sites. Check your model specifically. If available, this is 100% safe.
A "Function has been finished" message will appear. Turn the printer off and back on to resume normal printing. Supported Printer Models canon service tool v5204 free download top
Some versions are sold as "per-PC" licenses on sites like eBay or ORPYS , requiring a hardware ID for activation. Safer Alternatives For many newer Canon printers, Canon has released