Ok so I bought my first tank yesterday at a vapemeet and it was awesome. They showed me how to fill it and so we filled it with a 100% VG liquid and everything was running fine. So I woke up this morning and took it off, rinsed the tank (not the carto), popped it back on and filled it with the quick fill tip (this time a 60/40), put a couple drops on the top of the carto and did some dry pulls. Im getting a small air bubble that will just sit on the hole and not float up to the top. any suggestions?