hiya, washing your hair every day is bad for your hair as it strips it of its natural oils, thus reducing nutrtion and shine, if it is greasy hair , you should try using a lemon based shampoo, shampoo twice, and use a minimal amount of lemon based conditioner, do this every few days.
If it is dry hair , use an almond based shampoo and conditioner or conditioning treatment/mask and leave your conditioner on for a long time whilst you soak in the bath, the heat and damp will activate it better, good luck! tash x