Working on updating my new (old '87) H23. The interior of the boat and all the contents has a mildew order which I am trying to eliminate. I have original cushions and the covers are in decent condition but I can't get the mildew odor out of the vinyl which is on the bottom. I've scrubbed the vinyl and washed the covers in the machine with a bleach solution and detergent. Today I let them out under the sun all day and I am still smelling the oder. Does anyone have any idea? I don't want to invest in all new covers AND the foam which I intend to replace. My next thought would be to remove the vinyl and replace it with a breathable material. I can sew!