Like wooden frames, varnished frames are also very easy to maintain.
With a damp cloth, wipe the frames until clean. For hard-to-clean areas, run the cloth under warm soapy water and use circular motions until the dirt has been removed. Dry the frames immediately to ensure that damage doesn’t occur to the varnished wood.
Once dry, use a varnished wood furniture polish and a soft dry cloth to put the shine back into the wooden frame.