The Epson EcoTank. Yeah, I went through three of those under warranty before I gave up. I bought my color laser immediately thereafter.

Epson's design decisions with those, at least of the generation I had, were worse than questionable. The ink tanks are not sealed, so your ink slowly dries out and thickens. Then the print head clogs. Dust can also work its way in under the caps. There is no way to drain the tanks for transport, cleaning, or removing expired ink (except to use a long syringe) and there is no consumer accessible way to purge or clean the lines inside, either. The print head is also not removable for cleaning or replacement. If it gets gummed up and the printer's inbuilt cleaning song-and-dance with the wipe pad can't fix it, you are capital F fucked.

Epson then instructs you to drain the ink tanks before sending your unit in for warranty work, knowing full well that they did not include any provision whatsoever to allow you to do so. Genius! After the warranty expires, the machine is landfill. It is not feasibly serviceable by the average end user.

Needless to say, I do not recommend the Epson EcoTank line. It's great that you're having good results with yours, though. I certainly didn't with any of the three I had.