This product contains ingredients that may lead to clumping.
Clumping doesn't affect the functioning, it's just annoying. It does not mean the product is gone off.
Please store in the fridge once open.
See below links for more detail on clumping:
WHY HAS MY PRE-WORKOUT GONE CLUMPY https://www.cardiffsportsnutrition.co.uk/blogs/articles/why-has-my-pre-workout-gone-clumpy
My creamax HCL / Stimumax / defib has gone solid what do I do? How do I prevent this? https://www.youtube.com/watch?v=FZ675978VKI&t=10s