Sounds like you're well on your way to an amazing vape!
Different people will say different things about steeping. Steeping is basically just aging the juice in some manner. Some juice is good fresh out of the mailbox and I know some folks steep certain juices for a year! Tobacco/bakery/complex flavor juices seem to require the most time, where menthol/mint/simple fruity juices are usually good fresh (in my experience, your results may vary!)
Personally, I just stash new juice in my vape cabinet with the caps on for a week or so if it isn't quite awesome out of the mailbox. If it's still not totally blended or I plain don't like it, I have a box in the cabinet where it'll sit for months some times before I try it again. Boba's Bounty is one I know I have to let sit for 3 months before it's any good for my taste buds.
When I DIY juice I'll give it an hour in the ultra sonic and it definitely makes for a quick steep in a lot of ways, but it's not a substitute for good ol' fashioned patience.
Ok I have to ask when you put it in the sonic cleaner are you putting it in in the bottle or just pouring it into the cleaner?
