An update: Yesterday I was already pretty baked and tired, but I'm pretty sure it combusted ONE TIME. It was when I let my SO try the gh and she held the button for like 10 seconds instead of just clicking it (she didn't understood how it worked at first, it was my fault here). She got a lot of vapor after I turned it off and on again and explained how to use it. When I tried to use it afterwards, it burned and I felt a terrible taste of combustion in my tongue, followed by flashing red and blue lights and a rattling noise when heating up. Also it was changing from red to blue light in just 1 or 2 seconds instead of 3 to 5. I think it actually combusted just once and the nasty taste was there for like 4 or 5 sessions (4 pulls each). I slammed hard the gh backend against the palm of my hands a few times (didn't wanted to knock against a table lol) and rotated quickly the temperature dial a few times from 1 to 5 (saw that 'fix' in the gh fix thread, thanks for that I guess). This morning I tried to use it and for my surprise, no flashing red and blue lights and rattling noises, and it is producing delicious vapor like it should. Maybe it's fixed? My warranty request it's still open and I can't add a new message, since I already posted 2 things in it.