Our coconut milk powder contains 65% coconut oil. Coconut oil melts at around 24°C (75°F) and solidifies when it's cooler, that's why lumps may form in the powder. Simply break them up and it will return to a fine powder. If you add boiling water, the lumps will melt on their own as the oil liquefies. They can also be eaten as they are, like little coconut candies!