Dandruff Woes

I need a semi di lino treatment again! My dandruff's come back. Woe is me.

The first time I got dandruff was when I started commuting in high school. That's almost ten years ago! And I still have dandruff now. Maybe I've got a chronic case of dandruff. I've tried using Nizoral, Head and Shoulders even the very expensive Neutrogena shampoo I forgot the name of. The only thing that worked is that semi di lino treatment. But it worked only two weeks. Maybe spending two weekends on the beach and one in the pool is not good for my hair. Hay... I badly need another hair treatment.