Oath, fuck the restrictions.
Stop washing your hair. Only use water.
If it gets really filthy and greasy, only shampoo it once a week max. Make sure to use conditioner afterward. After you wash out the conditioner, put some olive oil in your hair.
The oil will be a natural layer of protection to keep your hair from drying out.
The most important thing is DO NKT WASH YOUR HAIR, it will dry it out and strip the nutrients.
Went from washing every day to washing once a week. Reversed my balding, and now my hair is fuller, thicker, shines with health and vitality.
Stop washing you hair.