Graphite will smooth the running for metal and plastic. That's why you are told to run a pencil along a zip that won't work well. Finely ground graphite is available, but be careful getting it on your hands.
Good Morning Thursday 23rd April 2026
Registering is free, easy, and means you can join the discussion, watch threads and lots more.
Register now »Already registered? Log in with:
Gransnet »