Can you use vinegar and laundry detergent together?

You can use vinegar and laundry detergent in the same load, but you cannot mix them. If you're using detergent, add the vinegar to the rinse cycle after the detergent is out. Otherwise, you'll get oily clothes.

Where do you put the vinegar in the washing machine?

That depends on what you want the vinegar to do. If you want to brighten your clothes, add the vinegar into the bleach dispenser. For softening your clothes, add the vinegar to your fabric softener dispenser. To fight mild odors, add it directly to the washing machine basin during the rinse cycle, or use it in place of regular detergent and add it again during the rinse cycle if you need to remove really strong odors.

How much vinegar do you put in the laundry?

Use 1/4 cup of vinegar for very mild odors, 1/2 cup for medium odors, and 1 cup for strong odors or if you want to brighten your laundry.