@mccringleberry, as above I'm curious to see if you notice a difference in the amount your VC gunks up now that you have changed your draw technique.
I have no evidence to support this hypothesis but I'm going to put it out there anyway.
I'm wondering if the long continuous lung pull keeps the vapor moving through the VC so that it has less opportunity to condense on the inside.
While a slower more staggered mouth pull or mouth pull + lung pull method causes a short period where vapor is suspended in the VC giving it more time to condense.
Will be interesting to see what you guys observe.