In a message dated 3/9/2012 2:45:24 P.M. Eastern Standard Time,
gfs@GREGORYFSMITH.COM writes:

Help!  I need to remove one of my nozzles to flush out some  debris which
keeps finding its way to the tip.  Not sure if I can do  it from the
front, can't seem to access it from the rear.  Any tips  are appreciated.

they snap in place from the outside.. your cant pry them off from the
outside or youll break the plastic tabs.  you have to access it from the  rear..