Step 1) Put the cartridge on some paper towels in an area where you can tolerate a spill.
Step 2) Using a 1/16 inch drill, drill a hole on the top, lower flat surface -- 1/3rd of the way from the edge. Make the hole about where the letter "E" in LEXMARK is molded into the top surface. (For Compaq cartridges, look for the "O". For Xerox, look for the "E".)
TIP: You may take a large paper clip, unbend it, and heat it in a flame to melt a hole instead of using a drill.
Step 3) Keeping the cartridge on paper towels, take a syringe 10-15 ml with ink.
Step 4) Insert the needle fully into the hole. Get the tip of the needle to the bottom of the cartridge. Inject the ink very S-L-O-W-L-Y and watch until the sponge is saturated. You must get the needle deep into the hard sponge.
Step 8) It is not necessary to reseal the hole.
Step 9) Set above a paper towel for an hour as a drip precaution. Expect a few drips. Do not allow the cartridge to touch the paper towel at this point, since the towel will draw out the ink.
Step 10) For best results, let sit overnight before using. Tape over the vent hole if you plan to store for several days to prevent drying out of the ink.
To order ink, toner and supplies for you printer, please call 1-877-453-3640 or online www.bestinsupplies.com