I'm pretty convinced he was rewarded for cleanliness more than humidification.
Most of the "clogs" I had with the 9880 were definitely crud contamination, very few were from other issues like low humidity. A finger swipe across a rubber wiper blade that has not been cleaned in a while will support this assertion. And those line-of-missing-nozzles patterns spoke eloquently of kitty hairs. When I started covering up the top of the Epson things got much better in clog land.
I'm looking for something to cover the 8300, it's so big! The paper path and head parking areas are very well protected from environmental dust, but that poor roll lives awfully close to my feelthy floor.