According to About.com, a mixture of 2 tablespoons of conditioner in 16 ounces of water is a good homemade hair detangler. The site also recommends an acidifying rinse of 2 tablespoons of apple cider vinegar and 19 ounces of water.
An herbal hair detangler can be made by mixing 1 teaspoon of aloe vera gel with 10 to 15 drops of grapefruit seed extract, one or two drops of glycerin, one or two drops of an essential oil to add a pleasant scent and 8 ounces of distilled water. The aloe vera gel detangles and moisturizes the hair. The glycerin also moisturizes the hair and helps to prevent breakage.
A homemade hair detangler should be poured into a spray bottle to make it easier to apply directly to snarls and tangles.