I always shake n vape my recipes, if not good then I might revisit it again in a week or more. Sometimes a bad mix will just stay that way, sometimes something real good comes out.
Steeping usually makes the most difference with creamy and custard mixes, I hear tobacco as well but I don't use tobacco flavors. Steeping also helps complex mixes to blend together and for some flavors to come out that can't be tasted as a shake n vape. I had one mix that I could not taste the strawberry, after a few days I got a little bit of the sweetness starting to come through and after I forgot about it for a month the strawberry was there.
The worst part about DIY is the waiting, sometimes it doesn't make a difference and sometimes it makes all the difference. I have tried speed steeping methods from heating to ultrasonic but too much heat can ruin a juice. I really don't think it made a big enough difference to warrant the extra steps as well, now I just shake the bottle when I remember once a day and vape what I already have until the new juice tastes right.
