Inkjet sucks, buy a laserjet I know.

Normally, I buy $20 printers and toss them when the ink runs out, but this time I bought ink for my roommates printer only to discover what I should have remembered--replacing the black doesn't help. All ink cartridges must have ink... This is a matter of principle at this point.

Basically I want to short circuit the ink cartridge ink level reader so it thinks the cartridge is full. Anyone done this before, have some pointers?