My Polaris is spending a lot of time just wandering around not doing much. It doesn't sit on the pool floor just kind of hovers and doesn't pick up anything. Sometimes it just stops on an open section of the floor and takes a few minutes to restart. This is really driving me crazy as its using energy and not providing results. Any suggestion as to where to start? I'm at the point now where I am ready to just get something else and put this thing up. It was rebuilt last season.