Do you think you are able to clear your mind from the influence which would give you the answer you wish for? Some questions I ask have an outcome I am not attached to. For example, if I dowse for energy spots, lines, etc. When I dowse for an outcome of a situation (eg I apply for a job, hence I would like to get an offer), then it gets tricky in my view.
I dowse by trying to tap into the universe, which I symbolise in my mind as blue sky. I breathe deeply to let go of all emotions and feelings.