I assume this is a DIY job....
I have used a local laundry to do my old Morgan sails. They had a 50# washer and did each 25# sail separately. It was OK, they were clean, but general opinion is that a washing machine is too harsh on the sail cloth and will tend to break fibers. I have no idea if that is true or just hype from the sail cleaning companies.However, what I did two years ago is to borrow my buddies hot tub at the end of the season and wash my sails in it. I didn't use any soap, I just wanted to get all the sail out. They came out pretty clean, and my sailmaker saw them after thsi cleaning and he said that they looked good.If it was my hot tub, I would do it again and add some mild detergent.Hung them up to dry over a fence and bushes.Rich