Since my wife leaves all the question asking to me I will be asking this one on her behalf. She of course vapes like I do. She is not into it as a hobby but just to keep her off the stinkies. She has her favorite liquids and I keep her supplied in them. Most of them are a very light color. She has an acai berry she found at a local shop she loves and a Swedish fish flavor from Mbv. I keep her clearos clean and make sure she has clean coils. Follow up with her to make sure she is not getting a burnt taste and that everything she has is working well and she has no issues. So here is the deal. I will clean everything up but in new or clean coils for her. She uses an entire eVod system. Clearo and battery. She loves it. Within an hour or so her liquids will turn black as tar. She says the flavor does not Change just the color. This only happenes to her favorites. What on earth is she doing. I know she chain vapes those flavors. Is that what is causing them to turn colors like that?. Not a one of liquids has done that.