Hi stratman and PeterBJ you are stars

This morning I sat down to attack my MG5250 and carry out the reset method you so kindly related to me.
I had an old WinXP laptop and used my Canon Pixma installation CD to install the MG5250 using a USB cable.
At the end of the installation it offered me a test print and this churned out a test sheet so I knew I was connected.
I then transferred the V3400 service tool to the desktop and followed your instructions to put the MG5250 into service mode.
I started the 'service tool' and executed an EPROM printout.
The ink absorber figure was D=095.7% so I was very close to the printer stopping altogether...phew!.
I checked that the button 'selections' were as in your screen shot and clicked 'set'.
A second EPROM printout revealed that the absorber has been reset and D=000.0
I am now spurred on to dissassemble the printer and wash out the ink absorber pads. (I considered it wasn't worth the effort until I had proved the EPROM could be reset).
So one final question:-
When I started this quest I peered into the printer and could see what appeared to be the two rectangular ink pads directly beneath the place where the print heads 'park'.
One about a centimetre wide and 2cm long under the colour jets and one 0.5cm wide and maybe 3cm long(difficult to guesstimate).
I mentioned that they looked hard and dried up.
However when I look in the parts catalogue (or search online) the replacement pads seem to be a large pack of many unusual shaped (felt?) pads some look quite large.
Does the MG5250 use all these pads?
Or is the pack a set that services many printers and you just use the specific ones for the printer being serviced?
Thanks enormously for helping me beat the obsolescence system, saving my printer from the scrap man, and indirectly the planet.
What a wonderful community spirit you have here

Dave