Smoktech UDCT (artemas) troubleshooting

[Shields42]

So I recently purchased a UDCT from madvapes (great service by the way) and have been vaping for quite a while, and I've used tons of different systems including rbas rdas clearos, and normal cartos but never in a tank. If I leave my tank out overnight, it gurgles the first few hits, but gets better with time, and I am vaping with no PG, (my own mix) and I'm not sure why. Any insight?

 

[Sthur]

I have a udct tank and I noticed the same thing. If I left it overnight it gurgles for first few hits them fine.

Any thoughts out there? The vacuum in the tank or this typical of this tank?