Twice a week rub olive or castor or almond oil onto scalp at bedtime and shampoo next morning. Condition hair & wash off after 5 mins. Do a final rinse with cold water to add shine to hair.
Natural cleanser for hair
You could try adding few drops honey to water and use as your final rinse. Other natural rinses like plain curd or flat beer will bring back the bounce to your hair.
Soak some methi (fenugreek) seeds overnight with enough water to cover them and grind them next morning. Massage this pack on scalpa hair and leave on for 15-20 mins. Wash off with mild shampoo. Good against hair problems like dandruff, hair fall, thinning of hair etc.
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Here is an interesting video that you might like to checkout on dry hair
Alternative treatment of shampooing every day (Co washing)