I normally add a splash of vinegar to my bright fabrics to help seal the colors and clear any bleeding before putting them into my quilts (a little trick I learned from Eleanor Burns' show). But, now we have those new "high efficiency" machines where you can only use special detergents and need to add all cleansers/softeners/bleaches in certain spots before th load. Can you still use vinegar this way? It warns not to add anything but special detergents to the designated areas so I'm not sure where to add the vinegar.