I'm forever trying new shampoo/conditioner/styling routine. What happens is I follow a way of washing it etc and am pleased with the result. But then, pretty soon, it comes out completely differently. So I'll use x shampoo, conditioner and styling spray, dry it. Hair pleasingly shiny and styled well. Repeat for a week or so and it will soon look rubbish. It looks dull or lank or frizzy or whatever.
Is this normal for most people? Or just me? What am I doing wrong?