You have probably been wondering how often you should wash your hair? All though this is a common question, it really all depends on the "root" of the issue. Just like your face, your hair gets greasy for the same reason. Glands in the skin produce an oily substance called sebum. These sebaceous glands moistens hair and keeps it from drying out, which we all produce different amounts. How much washing is right for you? This is a tricky question bc there are several variables