When you wash your hair, use a gentle shampoo and warm water. Lather up using your fingertips, rather than your fingernails. You might use a conditioner or a shampoo containing a conditioner. This can take the tangles out or your hair and make it look smooth. But depending on your hair, it can also make it look flat and oily. Rinse your hair with plenty of clean water. Dry it gently with a towel and use a wide-tooth comb to untangle it.