I find it strange that everyone is throwing out the o-ring and calling it useless. I've been using fluxo's for about 6 months and discovered the magic of the o-ring the first day. Ever noticed how 1 side of the o-ring has a groove in it? Well, that groove fitts perfectly over the ceramic cup, if the center post is centered in the tube. The silicone cup pinches the wicks and makes the vape taste like crap. Also its a pita to remove and even harder to put back on.
Here's what I've been doing for 6 months, there's no leaking, i can refill and be vaping in under 2 mins also.
First, remove the cap, the o-ring and silicone cup. Now take the silicone cup and very carefully, throw it in the trash! Its garbage. Now, fill your tube by running the juice down the side like you all know how to do I'm sure, then, take the o-ring, slotted side down, make sure the ceramic cup is centered in the tube so that groove on the o-ring will fit over it nicely, then push the o-ring down over the ceramic cup, making sure the post is still centered and the ring is nice and level over the cermaic cup.
Viola! No more pinched wicks. No more worrying about lining up your wick slots. The o-ring can be removed and replaced with a simple toothpick or small tool.
You still get some condensation, but what I do is simply shake the condensation juice back onto the coil - much like dripping without actually dripping.
One tip, since the wicks aren't pinched anymore, extended storage on its side may draw a bit of excess juice to the coil. If this happens, just suck extra hard and take a few long hits to burn up the extra juice.
A general tip unrelated to my method, if juice leaks out the battery end, then you've somehow pulled the post up and broken the seal on the connection side. I like to use the flat end of a skinny pen to apply even downward pressure on the post, with the o-ring on, to make sure the post is seated all the way down on the connection end.
Good luck and happy vaping!
