Dilute it with two parts water, and spread the concoction over your face with a cotton ball to replace your current toner. You can do this at night after washing and in the morning before you apply your moisturizer. The acidity helps slough away dead skin cells while soothing irritation.

It is important to note that due to its acidic nature, apple cider vinegar alone may cause skin irritation. Always dilute apple cider vinegar before using topically.

How to make an apple cider vinegar toner: DIY Recipe

1. Mix your apple cider vinegar with water.

Apple cider vinegar must be diluted when used as a DIY toner. Because it is so acidic, "if not diluted properly, ACV can give you superficial chemical burns and skin irritation," explains board-certified dermatologist Dhaval Bhanusali, M.D.

Use one-part vinegar to three or four parts water (for sensitive skin types, even more water). Additionally, "before using it on your face for the first time, it's a good idea to try a test spot on your skin to make sure you won't have an adverse reaction," Barr says.

• Severe acne: 1-part apple cider vinegar to 3-parts water

• Moderate acne: 1-part apple cider vinegar to 4-parts water

• Sensitive skin: 1-part apple cider vinegar to 5-parts water

And because this home-made toner won't have the same stabilizers or preservatives as your store-bought options, you'll need to make it fresh before use. Try mixing each single-use dose in a shot glass—that way you won't waste ACV.