Air dry is best for drying as microfiber dries fairly quickly. Alternatively, if you plan to use the dryer, set it on low heat or no heat. This setting uses less quantity of water for laundering, less percentage of chemicals and consumes less energy for drying. But even so this, it is preshrunk to avoid any shrinkage after washing.
Do not use fabric softeners as they clog up the open spaces in microfiber, which makes the fabric useless. Also, do not wash microfiber with a terry towel or material that sheds numerous lint. Wash one at a time or with material like jeans or t-shirt that do not shed lint.