after setting my ecig down for a little while i went to draw on it and nothing, tried again nothing (battery just came off the charger), one more time and still nothing. took the cart off the atty dropped a drop tried "tail piping" (i think thats the term) nothing for the first 2 hits then it started working. anyone ever experienced this? its like the atty wasnt heating. i have been making sure to keep juice in the carts. Its working fine now but just took it a few minutes to prime up i guess. any ideas?