as for dehydration- just long long mists.
also, if shes tolerant of it..
you can do the shower method.
take a plant, put it on the floor of you shower
aim shower head at wall, so water bounces off wall onto plnat in a fine mist.
make sure water is warm,
put her on the plant, and watch her... maybe close the shower curtain so she cant see you, but you can see her. and just let her sit there for like 20 minutes.