if it's the one in your pic then remove the screw.I have the plate off and have exposed the valve brass workings. Just unclear how to remove filter - I assume it is removed as parrot the centre thermo control but no obvious way to remove.
no thats the rubber hose splitting or coming away from the metal part of the hose.On the flexible hose it's where the metal braiding connects into theplastic that the droplets are appearing. Does that sound like a seal issue?
it won't last like that so change it before you get a flood