I buy some of them, 50% has no contact to Coil. Shows no Atomizer in Mod menu. Find out, the Problem was a lot of Glue between the upper and lower Part.After 5 minutes heating with a gas burner, could screw up the upper and lower part.Clean the thread and reassemble it.The stainless steel has turned a little bit yellow but the contact is restored now.
thanks for pointing out the problem. a great solution for owners to rectify it and abit of colour added to it too ^^