teething rash

Holli
What do you mamas use on it? 
Obviously I try to keep her face as dry as I can and I put a thin layer of petroleum (usually when she sleeps)  when she is awake she is always going to town on her fingers and is a drooly mess all over her face.
I know babies teethe for quite some time. Is there ever a point where it just isn't so bad anymore, drool or rash wise?