Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
I used a mild detergent like Woolite or Dreft plus some bleach to clean up some sails with mildew and stains of some sort and it worked fine. As long as the sails are rinsed thorougly, the detergent and bleach solution shouldn't hurt them. I did this based on instruction from one of the sailmakers. Good luck.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.