The head and O-ring MUST be removed!!! The clip comes out forward (towards where the head *was*)
There are some threads in the archives on the clip removal. Sorry but no time to type a long spiel here. OK, quick. flat blade screw driver from the rear slipped into the "fold" of the clip. tube resting on edge of counter with clip overhaning edge, tail up. holding tube and screwdriver(parallel in axis) in one hand, whack screwdriver with other hand. If that is not clear, don't do it!! /ubbthreads/images/graemlins/tongue.gif