Make Dyed Hair Last Longer by Jaelyn Sloan Make Dyed Hair Last LongerWhen Dying It: Wash your hair with shampoo a day or a day and a half before you dye it. You don't want it to be too dirty but, you don't want it to have any shampoo residue left either.Washing: Don't wash it everyday! I would recommend to wash every other day.Conditioning: Always condition after washing. Also, about three days before dying the hair, do a deep condition to make sure the hair is very moisturized.Bleaching: If you want the dye to be bright or to stand out more, bleach your hair beforehand. Do not bleach frequently as it will damage your hair.Chlorine: Try to keep the dyed hair away from chlorine. Wear your hair up in a bun & keep your head above the water or wear a bathing cap.