I recently bought the joyetech ego one 2200mah battery vaporizer. I have only smoked disposable e-cigarettes before this, so this is my first actual vaporizer. I charged it for about 30 minutes and then filled it up with e-liquid. I started it up, and started to vape. Nothing happened at all. I tried holding in the button and It started to heat up and i heard some gurgling noises so it seems to work fine, the battery isnt dead or anything. When I vaped after holding the button in for a few secs there was still no vapour when i dragged but like some unpleasant air or something. I am a complete noob here. What do I do?