Well I am going to go through that in the review, but what happened is the o ring that comes stock around the 510 pin is flimsy. Eventually the pin will start working its way down and you have to continuously take a micro flathead to work it back up so that it makes connection with some things. The fix is basically to pull off the top cap (keep note of the way the wires are in there), pull the top cap up far enough to give you room to work. Take a pin, tiny flathead, or something small like that and push the 510 pin up and through. Then pull off whats left of that stock o ring. Put the red one in its place. push it back down, then thread that ego connector on to make sure it seats in there properly and doesn't push up while you're putting the cap back on. Make sure all the wires are looking close to how you had them, and you should be good to go. If you want to wait to see it, Im gonna pull the whole thing apart in my review. Ive already talked to Protovapor about the review and he is giving me some good info to share with everyone as well.