So, since I use 0mg, most of my juice when I do vape is clear. After a few day, the juice would start to turn amber for some reason. Now, I only have seen this happen in my Nautilus, because I never used a clear juice in my Atlantis when I had it, so I don't know if my issue is in the tank, or juice. What was weird was like, it would have a darker rim of juice on the inside, like that was dying it. I'm not sure why this was happening, or if this is a common thing in clear juices when exposed to light. The flavor wasn't really changed, but that was hard to tell with the Nautilus in the first place. I no longer have either tank anymore. So, was his a juice issue? Or something that jjust seems to happen naturally to clear juices. I wasn't really worried until I say the darker rim. Once, like that darker rim was there, and after I put it back together, it flowed into the tank and dyed it more. It kinda looked like food coloring when it first goes into water. I'm not sure at all what that darker amber colored rim was. I'm thinking it was residual juice, but I've rinsed that puppy a lot. (I should say the rim only was in the base, like where the coils met the base, or just on top of the coils.