Blood is like heroin for us and we can only feed from living humans. So you ever see me with blood on my mouth, I'm off the wagon and that's got to be it. Every time I feed the gap between me and the human I used to be gets wider. We're fine in sunlight and if a stake is removed on time and we feed, then we can recover. So you'd have to stay, keep the stake in place to make sure I was dust.
And I plan to keep trying. It may hurt like a bitch, but I figure it's payback for all the others I killed.