CC did try spraying a water spray bottle in DS's face after some incidents but it was early summer so warm enough to be nice on his face
Woah, never heard of that and to be honest, would never feel comfortable doing that to someone's child - can't really understand their reasoning behind it, the child is not a dog or cat. Also, time out is no longer considered an acceptable behavioural management tool in child care and centres are not supposed to be using it any more.
In my experience (must to the frustrations of everyone involved) there is really little that can disuade a biter and usually it is just a time thing, that they do grow out of. Doesn't make it any less frustrating for everyone involved though.