Many thanks to all who have tried to help with our problem. Our exhaust fan works very well and is vented to the soffit as are the other two bathrooms which are quite efficient. It appears the problem lies with the smallness of this room. The beadboard ceiling is probably more like we are looking for. Is there a smooth maybe vinyl sheet that could be applied with glue and then a crown molding around the perimeter? Does anyone know if this is feasible, and if so where can we find such material?