Depending on the model you may not need the chip setter. If you do a web search with your model number you should find instructions for clearing the "full" setting from the printer itself using maintenance mode.
Worked like a champ for my 4000 but I haven't needed to do it yet with my newer printers. It's easy to replace the internal sponge as the cover just snaps off. For the 4000 I found some similar looking material at the hardware store and used that. Not quite as good at holding liquid as the genuine article so care had to be taken when moving the printer or removing the full tank.
Epson is so not green it makes me blue......
Doug