Thank you so much Eric! I will try to change the jumper valve. It is a good idea to the spindle to a ceramic one.

Thanks for your quick response! I probably will just get a new tap and replace a new one

Thank you Ericl! I did use WD-40 to unscrew it but it is still not working. now when I turned on the tap, there is only very little water comes out

Thank you Michelle! I took off the small button and used an Allen key to remove the grub screw. But when I tried to move the Alllen key to the right o ...

Thank you so much Mitchell! It is such a quick response!

Thank you so much EricL! Does anyone know how and what tools need to be used to take off the tap to change the spindle? The Mondella basin tap I am us ...