I have ordered juices with warnings before, mainly cinnamons that come with a warning. I always mostly ignored the warning because I never had a poly tank crack/warp/melt before while using these juices.
Recently I finally got a juice, with a warning, that DID in fact damage the tank. It was nothing grand like a crack but it warped, tasted "off" and when I noticed the taste being a bit weird I took it apart only to notice the plastic drip tip partially melted/liquified in the catch cup. This was a new one for me and I was like "Holy sheet!". I wish I took pictures at the time...grrr.
So I chucked that tank and tip and put it in glass and steel. Unsurprisingly, all tastes fine again. I have since taken the flavour out of my rotation though although I did quite enjoy the taste and find it to be a solid juice other than the seemingly caustic nature of it.
My question to you guys (yes, I know you are all doctors and medical professionals haha) is: Do you think these type juices are wise to vape? My lungs haven't liquified to my knowledge but I have stopped vaping that flavour. The sight of all that melted plastic left me a bit scarred to be honest.