Try the solutions in the order shown, until you solve the problem.
Make sure you match the paper type loaded in the printer and the paper type selected on the printer to the paper type setting in the printer driver.
Use a higher quality setting in the printer driver. You may not be able to select a higher quality setting on some printer models.
Run a nozzle check to see if the print head nozzles are clogged.
If the nozzles are clogged, clean the print head.
Note that print head cleaning uses some ink.
Make sure you are using genuine Epson ink cartridges.
This product is designed to adjust colors based on the use of genuine Epson ink cartridges. The use of non-genuine ink cartridges may cause print quality to decline.
Make sure there are no paper fragments left inside the printer.
Make sure the paper is loaded with the printable side facing in the correct direction, and make sure the paper is not curled.
Make sure that you are not using an old ink cartridge.
For best results, Epson recommends using up ink cartridges before the best before date printed on the package, or within one year of installation, whichever is earlier.
Reinstall the ink cartridges already installed in the printer.
Reinstalling the ink cartridges may clear clogging in the print head nozzles and allow the ink to flow smoothly.
However, because the ink is consumed when the ink cartridge is reinstalled, a message asking you to replace the ink cartridge may be displayed depending on the amount of ink remaining.
If you cannot solve the problem after checking the solutions above, contact Epson support.