Earlier this week, Crystal at Everyday Food Storage posted a video showing how to correctly use a Blendtec Wheat Grinder. I was drawn to watch because it was the same wheat grinder that I use. And guess what? I haven't been using it correctly. Like Crystal, I thought that the cup that came with was just measuring cup. It turns out it has a functional purpose.
So, I encourage you to read the manual for your electric grinder. You might discover some information that you've been missing.
Don't know where to find the manual? Here is a list of several online sources:*K-Tec/BlendTec Mill - Crystal's Video;
*L'Equip Vitalmill - PDF