Sometimes my nutribullet Rx stops. I think it's because I'm trying to pack too much stuff in it. To fix this problem, I first see if something is stuck on the blades (this happened once with fresh ginger root). Usually, this is not the problem. I then poor about half into another cup and let the motor cool down for a few minutes. Blast half of the contents and it doesn't stop. Drink that while letting the motor cool down again for a few minutes. Repeat with the 2nd 1/2 of the contents. This would seem to indicate that the volume of food I'm putting in is too much. Would you agree, or could it be something else?