I bought two Smok Pyrex Ari tanks today (to help me try new juice) and I'm not terribly impressed with their airyness. Is there a way to change that? I own a designer Hypertank and it is my main all day tank and I love the vape I get with it. The Ari tanks both have 1.8ohm coils and I am running at 4 volts. Recommendations?