Finding the perfect shampoo can be a hassle. After all, you can't really know if a shampoo is the one just by looking at it—you have to actually try it out. That means once you find the perfect shampoo, you never want to let it go. So what on earth do you do when your shampoo stops working? On first thought, you think it's obviously you—no way did you spend so much money and time finding the perfect shampoo for it not to work! So you start changing up other aspects: shampooing less, conditioning more, washing less often... Nothing works. Unfortunately, the truth is, shampoo can actually stop working.
Think about it. You buy shampoo for a specific reason, whether it be to solve dull hair, flat hair, or whatever other reason. For a while, it's everything you hoped; your hair is shiny, full of moisture, dandruff-free and voluptuous. Problem solved!
But after some time, you might find that your hair becomes greasy or has too much volume. You used a moisturizing shampoo to give your hair life and now it has life. If you keep on using the same product, it'll end up overdoing it. Know what that means? You're going to need a new shampoo. And in a couple of months, you're going to need a new shampoo, again.
Don't fret though. You don't need to start your search all over again; instead, stick to something in the same product line! Opt for a more mild shampoo from the same brand, and keep on switching it up once your hair has acclimated. Shampoo problems, solved.