Wow-- lots of great info!! Thanks!!

Vinegar kills mold/mildew... good to know if it happens again. What would Borax do in your hair?

BTW--I don't use ammonia regularly. Twice a year max on mildewed towels & I ventilate well. The way I see it, 2C of ammonia a year into our septic tank has less environment impact than 30 towels going into the landfill or the water/detergent waste that Borax requires from multiple washes (& it doesn't always work to get the mildew smell out)
3a/b mix