Laundering Problems & Solutions | The American Cleaning ...
Failure of a blue coloring in detergent, laundry aid or fabric softener to dissolve or disperse. If caused by a detergent or powdered laundry aid, add 1 cup (240 ml) of white vinegar to 1 quart (.95L) of water. Use a plastic container. Soak item for one hour; rinse. If caused by fabric softener, rub stains with bar soap, wash.