Hi,
I quote Dillen:
You will have to dismount the hinge.
Press out the steel rod that runs the length of the Beogram, press it leftwards just enough to free the
hinge piece and lift off the alu lid.
Clean off the remains of the old grease. Sometimes contact cleaner is good, but that depends on the
type of cleaner. Then you can add a little kilopoise grease (it's not silicone), just a thin streak on each
inside surface of the damper and put it all back together.
Enjoy!