Leave it for 45 min. Wash it with shampoo. Instead of cold water add hot water or tea water and make a paste apply it on hair. Have hot coffee or tea and, Shampoo with hot water. In water add 2 tsp of brandy or rum.
Beer has a enzyme action on hair.
Rinse the hair with beer. Colorless henna is a mixture of herbs. It is used for dandruff, falling hair and for conditioning hair. Make a paste only with water. Wash off with shampoo.