None are 100% safe, but these are the most referenced by technician communities:
Physically replace the ink pads (buy a kit for ~$20 on eBay). Then use a free older service tool (e.g., STool 1004) for reset. Requires disassembling the printer. canon service tool 1050.exe download
Canon Service Tool 1050.exe is a piece of software designed for diagnosing and repairing issues with Canon printers. These tools are typically intended for use by Canon service technicians to perform advanced troubleshooting and repair operations. None are 100% safe, but these are the
WIC (Waste Ink Counter) Reset is a commercial tool with a clean reputation. Cost: ~$10–15 per reset. Canon Service Tool 1050
If the risks seem too high, consider these options.
Before you hunt for the download, verify your printer model. The Canon Service Tool 1050.exe does not work with every Canon printer. Incorrect use can brick your device.