How do I remove mildew stains from colored fabric?
Mildewed textiles need to be treated right. If you are not sure if your item can be bleached, you can do a quick bleachability test to check: add 1 ½ teaspoons of Clorox® Regular Bleach2 to ¼ cup water (or 2 teaspoons Clorox® Regular Bleach2 added to ¼ cup water); apply a drop to a hidden part of the garment like a hem or inside seam; wait 1 minute then blot with a towel; no color change means it is safe to bleach the item. For these items, the following approach should work:
For non-bleachable colors (or non-bleachable fabrics like wool, silk, mohair, leather, and spandex that should never be washed with bleach) it may be difficult to remove mildew completely since the best mold and mildew removers are products with sodium hypochlorite like Clorox® Regular Bleach2. Even so, you can try the following: