Spray water in the puppy's face? REALLY? Sorry Bubbles, but I don't think that's very helpful.
First off ... how old is your puppy? This is a normal thing for puppies to go through ... they are learning bite inhibition - how hard is too hard ... when soft is acceptable, etc.
To teach her to stop ... when she bites your hand you can say OUCH in a firm voice and then give her a toy that is appropriate for her to chew on / play with and encourage her to play with it (wave it at her, drag it along the floor, etc.)
There are many threads in here under puppies, and biting that you can read to get a better idea on how to handle this very normal behaviour.
Why don't I agree with the spray bottle? She might simply turn around and start biting at the bottle - which is in your hand ... so you could end up getting bit even harder ... and secondly, what do you do with the dog that LOVES to be sprayed in the face?
My last dog LOVED being sprayed in the face ... whenever I misted my parrots (for their baths) she would come running to me and stand there with her mouth open just waiting for the spray!
Marionís Zoo-Kyleigh, Raylan-cat, Echo-TAG,