Windex is an ammonia based window cleaner that seems to be a very effective ink cleaner
Checking one forum
http://www.printerknowledge.com/thre...-the-end.3980/
, this
http://www.halfords.com/webapp/wcs/s...Id_165651#dtab is suggested as being a UK equivalent.
Another video tested cheap "Wizz" (not much improvement) and AF Isoclene (worked wonders).
Without removing the head, underwiping with cleaner wetted strips of kitchen towel or J-cloth seems to be the way to attack the clogging from the face side, and syringe with tube from the top side.
NB. Repeatedly using the printer's own clean function will clock up the waste ink pad count, even if nothing actually gets through!