Thanks for the reply. It's a fairly new tank, but not the first time I've used it. This is the first time I've used this liquid vendor because my usual vendor's fire and ice liquid wasn't rated very well. I have refilled my tank since my original post. This time it's not cloudy,but I now have some little bubbles, like things are separating. The vape and flavor are both good, so I guess it's not hurting anything.