vinegar is not doing anything to remedy your problem- vinegar only sets acid dyes- which are not used on cottons---so no point in wasting more vinegar.
synthropol in the water will keep dye in the water from getting on other fabrics-
color catchers also help collect the dye in the water
it is important to remove it right away- don't let it sit wet touching itself-
you can usually find synthropol in quilt shops or stores such as joannes- or hobby lobby.