I've run into some flooding issues. It happens overnight when my reo is on it's side, or when it is in my backpack. It isn't really "flooding" but my battery, bottle, and sometimes the outside of the mod become greasy from the fluid. It appears to be coming from the 510 connection. I have had the mod for about 2 months now. I am guessing it may be the O ring. I have noticed that the RM2 when I line up the hole where I used to use it all the time it is not as snug as it used to be...if that makes sense. Is this a common issue this minor flooding, and I should just deal with it? I don't want to bother ordering new O rings and tubing and possibly a new RM2 if this turns out to be a common theme. The juice is not leaking from the top of the RM2 or the hole in the side.