Canon PIXMA MX459 Online Manual page 76

If you shake a FINE cartridge, ink may spill out and stain your hands and the surrounding area.
Handle a FINE cartridge carefully.
Be careful not to stain your hands and the surrounding area with ink on the removed protective
tape.
Do not reattach the protective tape once you have removed it. Discard it according to the local
laws and regulations regarding disposal of consumables.
Do not touch the electrical contacts or print head nozzle on a FINE cartridge. The machine may
not print properly if you touch them.
5. Install the FINE cartridge.
(1) Insert the new FINE cartridge straight into the FINE cartridge holder all the way
until it touches the back.
The color FINE cartridge should be installed into the left slot and the black FINE cartridge should
be installed into the right slot.
Important
Insert the FINE cartridge gently so that it does not hit the electrical contacts on the FINE
cartridge holder.
(2) Push up the ink cartridge lock lever to lock the FINE cartridge into place.
The FINE cartridge is locked into place when the ink cartridge lock lever clicks.