I would say that bubble is between the glass. If it wasn't, I would think that bubble would mix with the other juice.I love my apex but i have one issue I can't figure out. I will have a half tank left and when I tilt it to see my level I always have a brown blob. I then have to go poor out the rest of my juice... Sorta pressure wash my tank then start all over. It's every single tank no matter the juice! The blob just hangs out at the bottom while the rest of the juice is clear. I first thought maybe it's stuck between the two layers but i dont think it is. Why am i getting these? I don't like having to constantly dump juice. Help? Want suggestions?![]()
I clean my tank after every tank and I've tried all kinds of different juices in it.. If still does this in the apex but not my other tanks
Tapayappin

The next time you take it apart, maybe try taking all the parts off, the drip tip, the bottom, and even take the coil out.
When the coil is out, and you look in the hole where the coil goes, you can see a center hole and two square holes on either side of the center hole.
Then open the air flow up the whole way, and and try to run really warm water through the air flow.
The water should come out the bottom square holes . Run the water through both sides, (Both air vents).
You can run water through them square holes too, this water should come back out the side air vents.
You can try to blow through them too.
While you have it apart, you can also try to submerge the whole take under really warm water, up side down.
Let it fill up, Take it out of the water and try to shake all the water out.
Once the water is out of the tank, blow through it.
I haven't had any leaking with either my APEX nor my APEX 5, but I been using them Clapton coils..
The next time you have the coil out, look in the hole where the coil goes, and see if there is any damage around any of them holes.
Thinking maybe the top of the coil could of scratched the inside when putting it in.

I hope this helps, and Good Luck