JavaJoe

its possible that the nicotine is causing it...although vaping dosent have all the bad stuff that tobacco does, it does have the nicotine that does constrict your blood vessles and could possibly cause cramping.

awesome tip...that was driving me crazy...sometimes i would be vaping great and all of a sudden the draw/pull would get harder ...always thought i had flooded the atomizer ...but i tried what you said..i stuck a pin in the slots and wiggled it around...** voilla ** .. unrestricted air flow and the atomizer started working great...thanks so much..i'm a newbie and this kind of stuff gets you scratching your head....LOL...thanks a bunch