How long does DEXE shampoo last?

Could you please elaborate on the shelf life of the DEXE shampoo? I'm particularly interested in understanding how long this product typically remains effective and suitable for use. Does the shampoo have an expiration date printed on the packaging? Also, are there any factors that might influence its durability, such as storage conditions or frequent use? It would be helpful to know if there are any signs or changes that indicate the shampoo is nearing the end of its lifespan. Finally, are there any recommended best practices for extending the shampoo's shelf life? Thank you for your assistance in clarifying this matter.