The coil will glow for couple seconds and it will go into modulation. It is normal and expected. The coil will never glow like the first cold press again unless you up your temperature. I see many people talk about vapor production but what is the scale? Vapor expectations will be different. I think i would recommend you all to play with temperatures. I personally tested this one unit which came back to the office with vapor production complaint and right outside of the box, it was creating way too much for me for a low temp for my liking. So it is extremely dependent on the person and the expectation. I like low temp taste with medication and some other person may think that something is wrong with the unit. I can see how that is very possible. For those who experience charging issue, please apply the firmware or send it in and we do it for you.