Not sure what your are doing wrong but try a stock Joye 510 atty ( I use an Ego battery) and you should be able to get virtually no vapor. It is a great stealth rig.
I'm hitting my first order of BWB on a stock Joye510 and a straw modded round cart - I am completely impressed with the copious amount of vapor I get out of each and every draw. I would have to completely disagree on this one.