Its stuck down. Removed the cap to see whats there
It has a lock washer on top, and no obvious means to unscrew it. I assume gunk or hard water has built up that is locked the spring. I dont want to force anything, so will pour some vinegar and baking soda on it and see. This avo ill get some WD40 and try that. Any other ideas? The other one stuck a bit too when I checked that but ok now, so must be a buildup. Circa 6 years old
Looks like this from the top
