I have done precisely two things that worked for dandruff and both were shampoos: 1) get Nizerol in prescription strength, and 2) Use extra strength Denerex daily (which is far more often than their recommended max of two times a week) - and the Denerex really stings.

As I don't want to burn my scalp with Denerex and I still haven't gone to my new PCP for anything I currently have a head reminiscent of the Alps. Ah well.