You have purchased a quality Lexmark printer and it is performing quite well. But you are wary what it would do when the cartridge gets out of ink. There is no local refiller for the printers. The scenario demands that you learn yourself to refill the ink cartridge so that your work does not hamper when the cartridge needs to be refilled.

Refilling a Lexmark ink cartridge is an easy task. Remembering a few things would help.

While refilling your Lexmark ink cartridges, do it over an old cloth. It would soak up any excess ink immediately. When you are through the task, you can just throw the cloth.
If you are refilling an ink cartridge for the first time, you are likely to get ink on your hands. For getting it off, wash your hands with soap and water. Follow this up with a mild solution of bleach and water. Then again wash your hands with soap and water. Washing your hands thrice would help you get rid of any ink on your hands.
Always have a filled cartridge which is ready to use. As soon as the cartridge in your printer dries, you can take it out and put in the filled. This would help you avoid any mistake in haste.
When you sit down to refill a cartridge, do not wait for long. If you do not fill it up straight away, it will dry and clog the micro holes at the printer head. It would deter your printer from performing effectively. You can prevent this by filling a cartridge as soon as you take it out.
Follow the instructions given on your Lexmark ink refill. If you follow these instructions to the letter, you will be able to fill the cartridge efficiently in the least possible time.