How to Keep Spices from Clumping
Humidity will play tricks with your spices, causing them to clump together in their jars or containers.
Storing your spices in airtight containers in a cool, dark place is the first step in preventing clumping. There are other steps that can be taken to prevent the clumping of spices into the bottoms of containers so that they will shake out freely whenever called upon.
Following are a few ideas to keep spices in the best state possible at all times.