It wasn't the vapour it was the rebuildable coil i tried, 10 watt and it sent a mass amount of burnt cotton smoke down my lungs, the pre-built coils for the crown work fine at 40 watt, it was just the RBA that was like a bonfire, i tried rebuilding it 3 different ways with different amount of cotton and each way tasted foul and just of cotton smoke. That's why I keep putting up with coils that don't seem to last long. Just seems a waste constantly binning the entire coil after a couple of days, which is why i made the near fatal mistakle of trying the Crown RBA.