For a good joint, a fluted or spiraled dowel must fit snugly enough in the hole to allow the glue to come up around it. The dowel should reach to the bottom of the hole and be used with enough glue. For insurance, apply glue to both the sides of the hole and to the dowel itself.
During winter, a ceiling fan can move heat trapped near the ceiling back into the living area. This is especially valuable in rooms with high or vaulted ceilings. Remember to run your ceiling fan counter-clockwise in the summer and clockwise in the winter.