You want to access your tap's cartridge to replace it, but the star-shaped handle on top is stuck solid. Pulling doesn't help, and using too much force risks damaging the handle or the spindle. With the right approach, it almost always comes off without damage.
Star handles usually click onto a splined spindle. Years of limescale build-up plus a bit of corrosion between the handle and the spindle create a kind of ""weld"" that can no longer be released by hand.
Never clamp pliers directly onto the visible handle — this permanently damages the surface. Also avoid using a hammer; the impact can damage the spindle inside the tap.
Now that the handle is off, you can access the cartridge. Find the correct tap cartridge for your brand and type in our webshop, and read our article on the difference between left- and right-closing cartridges before ordering a new one.