How to Lubricate a Lock Using Graphite From a Pencil

Step 2 Stick it in the hole.

Next stick that chunk of graphite into the keyway of the lock. That word "keyway", that's some technical jargon meaning the place where the key goes.

It may be the case that the chunk of graphite is too big to slide in easily, but don't let that deter you, just force it in there anyway. A twisting motion may help. The point is to get the graphite into the lock. It doesn't matter if the graphite goes in in one piece or not because this graphite is destined to get ground into powder anyway.