If you get this message, it means that your printer is being worn down and you have to either:
(1) Replace your printer or
(2) Take your printer to a Epson service technician.
Here is a link on Epson's Official Explanation on why you are encountering this message:
This is one of the drawbacks from using Epson printers, but luckily most of their models are not expensive. Also keep in mind that even though most HP and Canon printers have replaceable printheads, the printheads themselves tend to cost as much as the printer itself!