I have been using inks from this company for a while now and have found the support very good. On their website they have this tip which might be worth a try before slinging the printer........
http://www.cobraink.com/supportphotos/support.htm
Soaking a Print Head
I have had good luck clearing a dried up print head by soaking the print head in hot water. We have a chemicals available called clog busters that is also very effective. Hot water works good. To do this turn on the printer and just as the print head starts to moving to the left unplug the power cord. This will unlock the head so you can move it right and left. After moving the print head away from the park position (full right) look under where the print head was parked and you will see a small silver grate covering a cores piece of foam this is the ink pump head. Using a syringe and needle (or eye dropper or even a straw with your finger sealing one end will work) fill the sponge with hot water (the hotter the better use this to fill the pump head until it domes up from surface tension and then slide the print head slowly back to the parked location. This will place the print head directly in the pool of water after 30 or 45 min. repeat one more time and then let it set over night. The next day run a head cleaning and a nozzle check if still plugged repeat this entire process. I normally use a Styrofoam cup and the microwave to make a small amount of hot water.
If when you do a nozzle check the paten changes and areas that were there now are not and other are that were not before the head is not plugged you are losing ink supply for some reason.