How to reset waste ink on Canon MX318

Turn off the printer.
Press and hold the RESUME button, then press and hold the POWER (or Stop/reset) button.
Still holding the POWER (or Stop/reset) button, Release the RESUME button, Next press and release the RESUME button 2 more times in succession. The printer will enter the"Service Mode".
Press the RESUME button 4 times, this will select the clear waste ink counter function.
Press the POWER (or Stop/reset) button to "set" the change, and return to the top of the function selection menu.
Press the POWER (or Stop/reset) button again to restart the printer