Does that mean you don't get any visible vapor in the bag? If not, your temp is wrong or the vape is broke. If you get visible vapor in the bag and aren't getting anything from it, can't help you there. I get plenty high from vapor.

This model is one of the less expensive ones and and the display numbers can't be trusted, so setting it at 350 may actually be too low to produce vapor. Don't trust the numbers. If you don't get vapor production, turn it up 'til you do. If you really crank it up and get no vapor, I'd conclude that it's defective.