I have an IKEA LOVIKEN AA-291347-1 faucet. It leaks between the 2 handles at the connection.  

I removed the screw behind, but I cannot remove the top center part.  

Do you have any idea how I can open it to change the seal inside?

[![enter image description here](https://i.stack.imgur.com/PLDFl.png)](https://i.stack.imgur.com/PLDFl.png)  

[![enter image description here](https://i.stack.imgur.com/UoPBX.jpg)](https://i.stack.imgur.com/UoPBX.jpg)  

[![enter image description here](https://i.stack.imgur.com/bXXC1.jpg)](https://i.stack.imgur.com/bXXC1.jpg)