Ethically, resetting the counter without replacing pads is sketchy. But if you install the drain tube kit, you are essentially performing a service-center-quality repair for pennies. Many repair techs encourage this—it reduces e-waste.
Older service tools require a hardware key. Some vintage electronics sellers offer pre-V3400 tools on USB sticks for under $20. These are obsolete for modern OSes but work on Windows XP/7. Free Download Canon Service Tool V3400