I feel like that video may help you. Sorry if it seems like things are being said that you already know, its not intended to belittle just sharing experience and trying to help out. I definitely notice a difference when adjusting that calibration. There's a few other good points (hand charts of vapour production) that I feel could help a lot of people just put things in perspective - my first 'big boy' vape was the Mighty turn on warm up go, not much to go wrong there. This (MV1) is a little more intricate plus the on demand is very different to every other vape I own. There's a lot of things to consider clean crucible/lid. Is there anything lodged inbetween the lid and the top of the crucible, seems even a small amount of bud can cause issues. Is the lid fully on when you close the door? Not slipped slightly out of place? One thing I did when I was finding my feet was put some silicone tube- about half inch around the stem so I was making a sort of stabilizer (Think it was whip from extreme q or similar replacement. The stem wouldn't go in any more but it could come out if I wanted it to. The stem sat flat on the heatsink. I found my sweet spot. Really hope you get sorted, would be very interested to hear how you get on.