Ok. Thanks for the answers
@Mr Numpty @simong &
@Tubbyengineer.
Firstly
@Mr Numpty - that makes perfect sense, airflow = clouds. Same as with wattage mode then.
Secondly
@simong I currently dont have a decent TC mod. I've tried SS on the Alien and on a cuboid taptec, just not getting the result I thought I'd be getting (even though I posted earlier in the week that the new Alien firmware may have been better... its not!) but that could be down to Thirdly
@Tubbyengineer post about wicking. Maybe I have it too tight.
How do I wick lightly enough for TC without danger of getting a leaky tank?