This will only slightly help...my cannon printers waste tank was never actually full, there is just a built in counter system that figures when it might be getting to that point.
To reset the count before you cant print at all because of it:
A) Turn the printer off.
B) Press and hold RESUME, then press and hold the POWER button.
C) Release the RESUME button, Next press and release the RESUME button twice more while continuing to hold the POWER
button). The printer's carriage will move a around a bit.
If by some miracle we did that correctly on the first try, you are now in "Service Mode".
D) Press the RESUME button 4 times (clear waste
ink counter function). The light will change color with each
key press. Press the POWER button to commit the change, and return
to the top of the function selection menu. Press the POWER button again
to restart the printer.
Now for to check the waste pad...(excerpt from http://www.neilslade.com/Papers/inkjetstuff11.html)
- Figure out how to open the printer by removing the side and inside
top plastic panels. Just look at the thing and use your brain. Its
all pressure clipped in place, no screws (at least on the S900 and
similar models, probably still the same on this years models.) Look
for slots and triangles on the 960.
- On
the i960 you'll have to remove the power buttons assembly on the
front- take out the two screws, unplug the internal white electro
connector plug CAREFULLY, then you can undo the last clip that holds
the top in place.
- No need to remove the ink cartridges in this process- so don't. The
mechanism is held down in place in the case by two screws at the
very bottom on the outside bottom of the metal chassis inside.
Remove these screws then lift up the mechanism. It should lift out
fairly easily, but remain attached by wires-- just place it on the
top edge of the case.
- You'll see the blackened (from waste ink) felt pads on the bottom.
WEAR GLOVES-- this is skin indelible ink, the only thing that will
get it off your hands is CLOROX. Period. There are two skinny pads
that sit on top of a larger pad. Note how they fit together.
- Lift the pads out and rinse out thorough in a sink until very little
or no ink comes out. There's no need to use chemical or soap
cleaners, just use plain water from the tap and the spray nozzle.
Keep rinsing and squeezing the pads, but don't twist them like a
towel, squeeze and fold in half however to really get the ink out.
- Lay
flat in the sun for a few hours to dry. Use a hairdryer to get the
last bit of moisture out then replace in the printer, and put
everything back together.
- RESET the printer electronics, so you won't get the stupid "waste
ink tank full" message any more. Do an online web search if
this doesn't work for your model, although this works (or slight
variations0 for many, including the 8200, the S800, and S900, and
the i-series like the i869, i950, i960, etc.Two main buttons on the
top of the printer- Power and the Resume:
If
you've reset the code first, then cleaned the pad, you're now ready
to print again.