Microfiber cloths only require water to clean. If desired, chemical cleansers that do not contain bleach can be used in conjunction with the cloth without damaging the material.
Use the cloth dry for all your dusting needs! The cloths are statically charged so they attract dirt, pet hairs, dust balls and microparticles like a magnet. Once the cloths attract dust and dirt it actually remains trapped in the grooves of the cloth itself so the particles are not just re-scattered in the air like with ordinary dusters. When a microfiber cloth becomes lightly dirty, shake it to remove loose dust and particles. You do not need to wash the cloth after every dusting--just wash the cloth when it becomes soiled or very dirty.
DO NOT over wet the Microfiber Cloth! Remember, the microfibers do the actual cleaning --using a lot of water or cleanser does not make it clean better; the water or cleanser is just an aid to help the cloth lift up tough dirt and stains. Lightly mist the area or lightly dampen the cloth with water or cleanser. The microfiber cloths can be used effectively with just water, however non-toxic or chemical cleansers that do not contain bleach can be used.