You can run
a Power Cleaning using the control panel on your product.
After a Power Cleaning, you must turn off the product
and wait at least 12 hours before running another Power
Cleaning.
If the print quality did not
improve, turn off the printer and wait at least 12 hours before
running another Power Cleaning.
If the print quality does not improve after running
the Power Cleaning utility multiple times, contact Epson for
support.