The message
from "John Smith" contains
these words:

Thanks all, the graphite from a pencil idea seems to work.

Be a little careful using pencil graphite in locks - hard pencils have
the graphite mixed with clay, which ain't good at all. Use as soft a
pencil as possile, or preferably proper locksmith's graphite.

--
Skipweasel.
In the beginning was the word.
And the word was Aardvark.