The biggest crime,if you do have it and you are not doing any thing to get rid of it.Here I chip in few tips to have dandruff free hair.Be regular with a mild shampoo and make it sure no residue of shampoo is left in your hair.You can massage your scalp with lime juice or grape juice,half an hour leave your hair like that and then shampoo your hair well.Give your scalp oil massage once a week.All this along with balanced diet will make your locks your biggest asset.