I have just found these instructions to reset the ink reservoir counter on a Canon Pixma MP130:
Press Menu > Scan > Copy > Scan to enter Service mode.
Now use the ">" key to select NVRAM then press OK.
Next, set ABS-M and ABS-P levels to zero before pressing Stop to exit.
There are also instructions for replacing the waste pads but these are longer winded, I'll post them if anyone really needs to know.
I use an Epson R2880 and as my previous printer bit the dust because the counter said it was finished, I'd love to know how to reset the R2880 if anyone knows.

