If your sweeper or dust mop does not restore the shine to a wood floor with a wax finish, try buffing to restore the shine rather than immediately applying another coat of wax. Buffing should always be tried before adding another coat of wax, as this will often provide a nice shine without adding another layer of waxy build-up.
If this still does not work, you will need to apply a wood floor cleaner and liquid wax made specifically for wood floors. After this has been applied, let the wood dry and then buff. This process should be carried out once or twice a year depending upon the traffic.
Common stains and how to remove them from a wax finished floor: