My lexmark detects when a cartridge has been removed and replaced and asks whether its a old cartridge or new. If I select old...it keeps the old ink levels. When I select new, it resets the levels to full capacity.
I've been refilling this current set of cartridges for about a year now...
I bought myself an HP1000 Laser about 1.5 years ago. ($240 bucks at the time at outpost.com) An older HP Inkjet 712C sits beside it. I've not yet replaced the laser cartridge ($65) since I bought the darn thing, nor have I had to buy ink cartridges for the old 712C - as I ONLY use it if I want something with some color.
Replacing an Inkjet Printer with a Laser Printer is like getting DSL or Cable after being on dial-up.
Now that I did it - I sing that country tune, "What was I thinking?" I don't think I'll go without a Laser Printer ever again.
As for the question at hand - dump the inkjet and GET A LASER PRINTER!