Place the item that you are going to dye into your washing machine and set the water to its hottest setting.
Fill the washer with water by starting the wash cycle. Add the liquid dye and 1 cup of vinegar to the machine once the washer tub has filled with water. You can place the dye and vinegar into the machine through the bleach or detergent ports on the top of the machine.
Let the entire wash cycle run with the item.
Remove the item and line dry.
Clean out the washer by running another cycle with detergent and 1 cup of bleach. Be sure to fill the machine to the fullest with water.