so i picked up a dct tank and thought i filled it properly. primed it with the top drip method until it looked fully saturated. could see juice in each of the slots in the carto. then i filled the tank using my stiletto drip tip like a slap yo mama. got it pretty full, small air bubble at the top. i was vaping along and then got a sudden dry hit. my question is, should i have left a bit of head space in the top to prevent a vacuum lock or is it possible i hit too hard for the 2 slots to keep up?