To steep or not to steep... that IS the question!! Some do, some dont. However, I have found that a few days can make a difference. If I order a juice from a made to order vendor, I find that by the time it arrives, 3-5 days later) its usually melded (mixed, steeped) pretty good already. They are good vapes without any noticable flavor changes as the days pass. With that said, when I began mixing my own, I saw the importance of steeping.. Though it isnt easy to wait, a few steeping days make a HUGE difference. Flavors can seemingly taste disgusting or deemed as a failure right away while letting them sit, (shaking them often) blend and smooth the flavors for a more successful/ tasteful/ pleasurable vape. I know this doesnt answer your question, but hope that it gives you another opinion or perspective!