Chris Holmes wrote:

I have tried coating the hinge with rasberry jam (This worked well on
the ball and socket joint on the door mirror of my last car when it
wouldn't stay put) but I didn't have any English jam to hand only
some nasty French stuff.

I think you're trolling, but just in case you aren't...

Remove the handle, and bend the pivot pin slightly. Then put it
back together.

--
Grunff