Originally Posted by waynemia
I was just thinking the rice to keep the sugar dry.
I know, I thought the same thing. I never fill till just before flight. being a 15oz hopper it fits an entire 15 oz bottle of powder that just happens to be the common size. IT seems the issue has less to do with humidity and more to do with how it packs under G-force and vibration. cornmeal makes it out, but lacks visibility. Flour has an awful tendancy to cake, and when released doesn't have the same visibility as talc. There is something about Talc that makes it very visible and it linger on the run. Trust me I would switch substrate in a heartbeat If I could find a sitable replacement. At $3 a bottle I spend more on powder than fuel right now.