HELP! I just bought my pen and i went to take a hit today and it won't pull at all. Convinced it's the mouthpiece cuz i took it off and it won't pull at all. I have the newer version. only one pen with replacement coils included. so theres only one piece to take off. Nothing really under the screen to clog it, i'm not sure why this is happening. Any help would be much appreciated!! when i take the mouthpiece off and exhale into it it opens up a bit, but as soon as i put it back on and go to take a hit it'll pull for like a second before becoming completely clogged again