Back when I wanted to try out squonking I received a ton of advice about which one I should get, and then it combined into my desire to try out an unregulated mod as well which lead me to the Pulse BF. I love it, but I did put it away for a while. The other day I pulled it off the shelf gave it a fresh build filled it up and when I went to take a hit no power I checked the battery and it was fully charged I put it back in and it fired for maybe half a second. I always used Brasso to clean the battery contacts like I was told I should and they are nice and shiny. All I can find on youtube is how to clean the battery contacts, I tried looking for one on how to properly take it apart but could not find any, and I don't want to break it so any advice? any ideas as to what the problem could be?