You use the durabrite catridges yes?
I dont have one of these personally but you can buy a chip resetter which allows you to tell the cartrige it is full. When i shake my cartridges there is still some ink in there but it says they are empty. A bit of a con.
The resetter is really for people who buy a tubs of CMYK inks and charge the carts themselves, the chip resets the cart and away you go.
The thing I found with epson printers is do not leave them starved of ink for long or they clog up and not even rotoring pen cleaning fluid will unblock them, on my third printer now!