This process requires two complete wash cycles. Do not add laundry detergent to either wash. Dry towels without fabric softner sheets. This process will strip your towels from all residue and remove that musty smell, leaving them feeling soft, fluffy and smelling fresh.
Wash your towels in hot/warm water (not scalding) with one cup of white distilled vinegar.
Run a second time with only a half-cup of baking soda. This will help freshen and remove any smells.