I've had my Epson 640 in dry dock now for many weeks but I've not yet given up on it. Before going to bed each night I give it a drink of the 99% isopropyl alcohol that everyone else reports success with and then jam gladwrap wads into the two receptacles to stop it evaporating.
Before attempting to print I suck a little colour out of each cartridge and then return it a little alcoholized - then insert each cartridge, but only after giving each slot a good freon pressure spray with a wand attached to the can. Also tried this with the hydrogen peroxide.....but that seems to get nowhere.
Because I believe what I read on the WEB about other people's successes with these methods, I'm loathe to give up. But a bit of wire fine enough to re-poke the holes in the printhead would seem to me to actually be the way to go. However I don't know where one could get any wire of such "smaller than human hair" thickness dimensions (and with sufficient rigidity to poke).
Always loved a challenge and this one should keep me going tio Xmas (when Santa might bring me a new printer), Anyone know what the solvent is in the A$55 kit thaty Epson flogs?