Try sucking air into the mouth as if you were using a straw,get straw, get them to use as much force as possible. This temporarily dries out the mouth, but you have to make sure that the person is comfortable swallowing their own saliva.

Try sucking air into the mouth as if you were using a straw,get them to use as much force as possible. This temporarily dries out the mouth, but you have to make sure that the person is comfortable swallowing their own saliva.