Moldy grain issue
Back in December, I ordered some Rouge de Bordeaux grain and after it arrived, I put it into two different plastic containers that I'd bought at Target. Been pulling the grain from one of them for grinding into flour for my bread. Just today, I happened to check the other container and saw what looked like flecks of mold on the sides of the container, but there was a lot of mold on the bottom. The containers are ones like these: https://www.target.com/p/oxo-pop-4-3qt-airtight-food-storage-container/-/A-15420439#lnk=sametab
Haven't seen any evidence of mold in the container I've been pulling grain from. It's stored in a different area than the "moldy" container.
Two questions: 1. What might cause mold to develop in the first place?The moldy grain was stored in a cabinet above one of our wall ovens. It hasn't ever felt hot up there, but I've never measured the temp after I've had the oven on. Is this perhaps the cause of my problem?
2. Can I salvage any of the grain? The mold is visible mainly on the bottom of the container with some smaller spots on the sided.
Thanks for any advice about this.