Cold settings will not clean towels as effectively
Never use fabric softener
Use a microfiber dedicated detergent to clean your towels. e.g. Gyeon Q2M Microfiber Towel Wash or P&S Rags To Riches
We also recommend adding 1/2 cup to 3/4 a cup of distilled vinegar into the bleach tray on the washing machine. The vinegar will provide more cleaning power, resulting in a softer feel and less stains.
Do NOT use with fabric softeners and avoid mixing microfiber products with non-microfiber products.