This is absolutely brilliant as the vinegar neutralizes odors and leaves no vinegar scent. It helps get rid of soap residue – or even residue from commercial fabric softeners. The essential oils are optional if you want pleasant smelling laundry.
1/2 cup of white vinegar
a few drops of sweet smelling essential oils (such as lavender) optional
Mix vinegar and optional essential oils. Add to your laundry during the rinse cycle. If you have a fabric softener dispenser, you can pour it in there.