To get rid of dandruff using apple cider vinegar first wash your hair normally with shampoo and then once the shampoo has been rinsed off, take a spray bottle mixed with about a 1/4 cup of Apple Cider Vinegar and water and shake the bottle up to mix the contents really good.
Then just spray the apple cider vinegar and water mixture onto your hair and let the apple cider vinegar and water solution sit on your hair for at least 15 minutes.
And then after 15 minutes you can rinse it off your hair.
You should use the apple cider vinegar on your hair twice per week to help get rid of the dandruff.