I watched YouTube videos where people have successfully cleaned the heads of their printers with alcohol using various methods.
This worked for me when I had an inkjet printer, so it may be worth your while to give it a try...
When my cartridges stoped working I nuked them for 3 seconds - but only 1 second at a time or they start sparking...1/0ff/1/off/1/off - and then I wiped them with warm water.
Never failed to get them going again.
