is it a rubber "O" ring, seal or graphite that goes in the cap, where the on / off knob is, in mine it is graphite, to stop it leaking, if rubber, I have a small "O" ring in my No2 cooker bag,
All the seals are rubber, at least they should be. I suspect the "graphite" is knackered rubber which you can dig out with a tool of your choice or burn it out with a blowtorch. An "O" ring should cure the leak.
the last owner put graphite in it, had a poke around, properly been in there for years , now worn away, so will leave it in and put a rubber seal on, from me No2 cooker spairs bag, light it up,
