Plumbing

[Moniula]

Hello
I need some help with removing blanco tap handles. I removed small screws with Allen key but tap handles doesn't want to come off (and I have to change cartridges as it's leaking). I used WD40 but still nothing.
I would appreciate any advice what else can I do before I have to call plumber.
Thank you.

 

[dilalio]

Killrock and a good technique to battle the limescale! You're fighting to get the male and female spline parts to release.

 

[Moniula]

Killrock and a good technique to battle the limescale! You're fighting to get the male and female spline parts to release.

Thank you for advice, I'm trying limescale removal now, I will try the one you suggest. But it's seat so tight so I'm wonder if there is no additional screw I missed and have to be removed?