I've been searching on here for this. Haven't really seen anything much about it. I've noticed the housing around my atomizer head is so hot to the touch. Kind of alarmingly. Hasn't caused any real problems but I just don't understand why. I've attributed it to using 0.5 clapton bvc coils made by Innokin in my Cool fire IV plus at about 30 watts. These coils are rated for 30-70 watts. I've worked them up slowly... I use all VG Burley Beard tobacco flavor or unflavored (sometimes a mixture of both) from Velvet Cloud. Could the VG cause the heat or? Any VG users out there have a similar situation? Thank you kindly.