You could say that it's my purpose to. I should know these kinds of things.

[ she grabs a bit of the oil, a bit of cleaning fluid, and passes a cloth over the parts as needed. ]

Something not well kept becomes dangerous to itself and others. [ pause. ] Haha, it sounds almost poetic when I put it that way? But it's fairly literal here. It could become unreliable, damage the mechanisms, even potentially injure the wielder.