I wash all towels at least once before using them with a microfiber specific wash like MicroRestore and then dry them on the lowest setting until they are about 90% dry and then pull them out and put them away. Don't use powdered detergents, bleach, or fabric softener. That includes dryer sheets too.
Almost forgot, I run the washing machine twice. Once with MicroRestore and then again with white distilled vinegar.