"N_Cook" wrote in message
...
Or ignoring the scratch marks made on the base , and push in with 4
fingers
on the base, after all it is only cosmetic damage.



'Stubborn' ones get helped out of their sockets with a small flat bladed
screwdriver between the valve and socket. New ones are fitted with a
standard yellow cloth duster on the top and palm pressure. I don't let the
scratch marks from the retainer claws bother me ...

I can't recall ever having had one break on me in the way you describe.

Arfa