The easiest way to wash these is by hand not in your washing machine.
Washing microfiber cloths in washing machine. Use the minimum needed heat when washing microfiber towels. Because washing microfiber with hot water opens the fibers to release dirt and grease. Many people already have such a container from nuts or other food.
Wash prior to use. Check back in a few minutes as it takes very little time for microfiber to dry. Darker colors can bleed microfiber is not color fast Do not use bleach.
Clean your cloths in the washer using warm water and a gentle liquid detergent. Machine wash a load of microfiber cloths in cold or warm water. No heat no fabric softener no detergent.
Instead add a gentle liquid detergent with no additives to your washing machine and wash with cold water. Pretreat stains or spots with a drop of liquid laundry detergent. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
To that add a few drops of dish detergent such as D. Use a mild liquid detergent thats free of softeners bleaches perfumes and other additives. Wash heavily soiled cleaning cloths in warm or hot water and lightly soiled rags in cold water.
Shake off excess dirt. Wash on a cool or warm setting with no detergent. Afterwards place the cloths in the dryer on low heat with no dryer sheet.