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Lately I've had to clean the nozzle 3 times before I used it, every single time, or it printed only blank pages.
Is that before or after you started shutting it OFF when not in use? If the heads aren't 'parked' ( usually by turning the printer OFF ), the heads are exposed to air constantly and the ink in them will dry. Indoor humidity levels are probably around 20% unless your house is air-conditioned, in that case the level may be closer to 5 - 10%! And sometimes Winter-time heating can make things just as bad.
So, you have two options:
1. Turn the printer(s) off until you need them ( keeps the heads 'parked' ).
2. Move them out doors where the humidity levels may be high enough to avoid the air drying. You'll probably not want to use your front porch, however.
As for ink costs, remember, these printers are only secondarily made to make prints. Their primary use is to use up the ink in the carts the company sells. Most people are finally becoming aware of how little ink is actually in those Name-brand carts. Replacement carts, with refill caps, are available for 99% of all Epson printers ( and many others, as well ). For the price of a new 'filled' cart, you can usually buy at least an 8 oz. bottle of ink. They are very reliable, easy to use and refill and the good systems use excellent inks that will not harm the printer in any way, shape or form.
...I just started turning it off a coupla hours ago. I just found out about this "parking" thing, and after all I couldn't even turn off the *&^% device without the help of you kind folk!