I've got the same problem with both of these. I've learned that Smok internals are not that great but that's what I have now. My problem after months of being used, the buttons are very difficult to get them to fire. I have to find just the right spot on the button for it to work. But it's never the same spot. I have to press it like 10 times or so for it to finally fire. I suspect leaked juice got inside and is causing it. I've searched for how I might get inside, but found nothing. Any thoughts or ideas, aside from just tossing it and looking for another similar device? Ideally, I'd really like to get inside.