I was advised after buying my first Protank 2 (it's my first e-cig setup) to soak it in vodka to remove any bad flavors that may have come from the factory. I know how to put it together and take it apart but after soaking it in the vodka two white O rings came off and I have no idea where they go. Google led me here and I did a search of the forums but couldn't find the answer. Could anyone give me a hand? Thanks in advance, happy holidays.