Why milo gets harden?

Milo, a chocolate malt drink, can harden due to moisture absorption from the air, which causes the sugar and malt particles to clump together. This process is accelerated in humid environments. Additionally, if the container is not sealed properly, exposure to air can lead to oxidation and further hardening. To prevent this, it's important to store Milo in a cool, dry place and keep it tightly sealed.