The chair backrest is wrapped with sponge cloth, if how dirty cleaning is good, can not be discounted
Finally, with a damp cloth wet cloth more soap water scrub, this process can be repeated several times, until the end of the soapy water wash cloth. Dry in the shade and dry in the sun.
Wet the cloth with soft cloth with water. Then gently brush the cloth with soapy water. Where there is dirt, wash it with detergent;