De-clogging kits just for this purpose are out there (maybe Epson has one - they should!) as it is a problem of long standing with Epsons. The root cause is the "Not Invented Here" syndrome. Which means that they invented a piezo technology head which runs relatively cool and allows them to use a faster drying ink. Both of which contribute to clogging problems...
I have removed the print head from the one I had but I don't recommend it for those with little technical experience. There are Epson clog clearing ideas all over the web.
Due to the fast drying property of the Epson inks and the fact that black and color inks are all pigmented, you have to be VERY fast when changing ink to prevent clogs from starting.
Unless yours is still under warranty, I'd send it to Epson and have them fix it. Here's hoping there is a local service center near to you.
Otherwise, I hate to say it, but I'd recommend looking at the Brother MFC-640 that's on sale at Office Depot this week ($125. after $75. rebate). Thermal head for little or no clogging problem. Passive indivudual ink tanks for which clones are available (my favorite ink supplier, swiftink.com, and others sell them) and are easily refillable for low operating costs over the long term. Some of the best networking features out there. Mixed reports on print quality. Or just about any other All-in-one (except for Lexmark)...
.bh.