Easy answer. Try it. If it tastes chemically or perfumy or bad, it may need to steep. But, from what you have described, it should be fine immediately, as others have mentioned above. The answer to how long anything should steep is simple....until it is ready to vape. I have found that only very complex recipes with many ingredients need more than a few days to steep, though one of my ADV takes about 5 weeks to steep and undergoes three distinct flavor changes. Single ingredient mixes a day or two. Several ingredients, four or five days. Ten ingredients, days to weeks. You can only tell by testing/tasting. Every juice is different, as is everybody's sense of taste and flavor. So, whatever works for you is best. Good luck to you in your JuiceQuest. Welcome to the Forum. Best to you!