Started with leaking tap, we thought we had to change the mixer cartridge. After removing the little blue/red cover and little screw inside, we expected the handle would come off easily, but it didn't. We tried pulling really hard, sprayed WD40 and left for a few hours, pour got water over it, it only came up a tiny bit, I'm worried I might break something inside. Brand of this tap is Zuccheti. Advice please.
