Unpluging anything from the appliance itself leaves a cord that still has power and can present an opportunity for electric shock. It is much safer to unplug from the electric outlet. Then on just another similiar thought, just unpluging a cell phone from the charger, but leaving the charger pluged into the outlet is still using electricity. Maybe not much dollar, but why give a few dollars to the Power Company when we could spend those dollars at the fabric store.