Been there---done that--
I have the same printer and have cleaned it several times---
here is a link to the info I use---one trick I added was to install the old cartridge AND THEN ADD THE ALCOHOL--relax---let it soak--you can't use it anyway....I have never had one not clean up---also run the cleaning process while the alcohol is in it--
there is a tray under the heads to catch the excess...
http://www.weeno.com/art/0899/140.shtml
there are other links at this site...LOL