I purchased a Nutribullet at Walmart on 12/18/2013 and on the first use smelled smoke and actually saw smoke. The canister was only filled to the max line and everything in the canister was soft food or liquid. At first I suspected that I forgot to move some wrapping to an internal part, but there is none. My second guess was that I did not twist the canister onto the Nutribullet well and some fluid leaked out and drained into the housing unit where it came into contact with the motor causing the burning smoke smell. On my second use, I made sure not to overfill, and twisted the lid to the canister extremely tight. This time, I still had a VERY strong smell of smoke and also noticed white smoke coming from the NutriBullet housing.
In fact, I strongly feel that had I left the unit running for just another minute or two the unit would have caught fire or the motor stopped working.
My review of the NutriBullet is cautious because of this and want to hear from others who have purchased this device to see if they have experienced the same thing, and what they found (if any) to correct it. I did notice quite a few review sites have people on them who have experienced the same thing, but could not find any answers.
After smelling smoke using your NutriBullet were you able to get this issue resolved using customer service?
UPDATE: 12/19/2013: I was able to resolve this issue after several other test runs. First, the max fill line in my estimation needs to be lowered and you need to make TRIPLE sure that there is a lot of liquids in the canister prior to juicing. If there is moderate thickness to the contents of foods you put in this device, the NutriBullet simply can not handle it and the motor will start to burn and emit smoke.
In fact I would use the milling blade all the time unless you have 80% liquid to start with, then finalize your juicing using the extractor blade and canister.