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To AVOID leakage, which happens with all of my LostVape vaporizers except the Orion series, you HAVE TO wrap the bottom O ring with a 1/8" ish wide piece of plumbers tape. Believe me, I hate the f*cking Chinese and the fact that leakage isn't something they care about in the Vaporizers they design and market....if you wrap the bottom O ring of the UB Lite coils with a strip of plumbers tape, you are golden. This UB Lite vaporizer is my favorite, lots of flavor with the .8ohm coils. My advice, NEVER use the fire button. Every once in a while, clean the inside lip of the vaporizer, where the battery leads are with a Q tip, some water vapor does condense there with use.