Vinegar is the key to whiter whites and softer towels, but most use it wrong. Here’s the right way to use it. Full article

Step 1: Use Distilled White Vinegar Only

Avoid apple cider vinegar or colored vinegars—they can stain fabrics.

Step 2: Add Vinegar During the Rinse Cycle

Pour ½ cup (120 ml) of white vinegar into the fabric softener compartment of your washing machine.
This allows vinegar to work during the rinse, not the wash.