Epson WF-4640: Print out blank pages. Printhead is clogged

Hi everyone,

I have an Epson printer, WF-4640 that is fairly new, but have not used for about a year. Now each time I try to print, all I get is blank pages. I did all all the test and ran the cleaning test several, but no luck. How can I take out the printhead and give it a total clean up?

Thank you for all your help,

Faliere