I am very sorry to hear of the issues that some of the folks here on LL are having with their printers. It is clear that these are real and highly frustrating issues for those that have them.However, what I see as a bigger concern is some of the statement being made with respect to Epson, what they know and what people think they know.
Over the past 15 years I have used HP, Canon, Xerox and Epson printers in my business. We have had Epson printers ranging from the 4,000, 4,800, 7000, 9000, 7600, 9600, 7800, and 9800. Currently, we have a 2 year old 7900 and a 1 year old 9900.
Our printers get moderate use, certainly not a service agency type of use, but what I would call moderate weekly use. There are times that a printer might not be used for several weeks at a time. They are always left on, and do their thing. Occasionally we have a slight clog that a cleaning cycle clears. Our office stays at roughly 44-48% humidity, perhaps higher when our a/c shuts down at night. We are in the tropics so dry air is not something we deal with.
The 7900 and 9900 have run issue free. (Knock on wood). As a business, we maintain the service contracts and since we take 3 year leases on the printers with a fair market value buyout, we give the printers back after the 3 year term and lease new printers every three years or so. We feel that the service contract is an insurance policy and with our methodology we are never without a service contract. The monthly lease payments are extremely low, we expense them 100% and have found that this methodology results in little or no heartburn.
In 15 years we have had one major printer issue that could not be fixed. It was with a 9600 that Epson replaced after service could not fix it.
We have also had few issues with the HP printers. We find that the Epson output is second to none with respect to the printers we have and currently use.
I realize that many people do not run businesses and as such can't structure their purchase as we have, but i also want to say that not every Epson 7900/9900 printer is problematic and has these severe clogging issues.
Bill.