No staining, but I drink water almost constantly since starting to vape.
I have a theory that it may have more to do with dry mouth than anything else. Less spit in there to wash stuff away.
There should be NO sugar in juice.
It would clog the atty horribly.
If you clean your attys frequently, there should not be a problem with this. Personally, I can't handle juices with no sweetener. I have tried...and they all wind up yucky and I have noticed a difference when I do vape mostly sweet juices...I don't tend to eat as many sweets.
Anne
Actually, I was reading in the health section that some cigs are 10% sugar.
Oh, now, that's just gross! Have you ever seen burnt sugar? Vile stuff to be sucking in.
if there´s no sugar , It must have some kind of glucose , what makes it SWEET ?? I like to know that