Pat drying the body helps too if you have dry skin. Removes less oil which you lack in, don't rub what little natural oil you do produce off. Hot shower bad too. Don't open pores.
If you suffer from dandruff and no product has ever helped or only made things worse: try no products at all. People won't believe it works but watch as nobody notices and your lovers compliment your hair all the same totally unaware because you smell and look just fine without putting $40 of GLORP MEGA MOISTURE NOW WITH DEMON TEARS XXXTREME in your hair.