I know it's a simple thing, but...
one of the best ways to keep your spices from not clumping (I'm talking about the ones we use on a daily basis in our own cupboards) is to not hold the shaker over a pot of steaming "whatever" and shake. Especially if the lid is off. Steam gets into the bottle, cap goes on, stuff gets lumpy.
Now how do we go about educating our customers not to hold the bottle over the steaming pot which makes our products get lumpy and then they think it's the product's fault???
Wildfire C.A.- I'm looking forward to hearing how your experiments come out.