I can't mix with or vape store bought juice that has stevia/sucrolose in it any more. All I taste is that chemical flavor. I know it as soon as it hits my tongue and it turns me off the juice immediately.
Try substituting FA Marshmallow or FA Joy or a number of other flavors that work way better as a sweetener.
One on One has a sweetner that I use sometimes, usually in a fruit mix if the other substitutes don't get the result I want and I have no idea what it is but its not stevia/sucrolose or anything that tastes chemically.