What I do when I fill and put the top back on is quickly turn it on it's side and rotate the tank. Then the over fill of juice because of the vacuum is saturated into the filler. Then if there is a slight gurgle a very tender draw while taking the first puff gets rid of the gurgle. The trick is getting it sideways and rotating it quickly so some of the pressure is released through the holes in the carto.
What? What? What? What is this you're talking about 5C???

Tell us more. Tell us more 5C and Isaac! Please.
Oh and it is a sweetheart. I gotta say I'm loving this little jewel. Isaac has, as I said before, taken great and made it better. I've been using this one for 3 days now and the draw is the same as the first puff, but I use 100% PG so it's a very clear, thin juice.
Another thing is the bottom seems to melt right into the tank without that 801 bump on it. Now you need to have the option of a shorter tube so it can be used either way, with normal fusions or the longer ones. The caps could remain the same.
PS, I love this Swivel Drip Tip. It works great for vaping while laying down watching tv.