@Mike162, I don’t use hot water so I can’t help you out in that regard, but I would suggest whatever method you use, to leave the caps on so you don’t loose flavor molecules, and do not use heat if you have NIC already in your juice as it will oxidize it.
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As per @SessionDrummer heating nic is not advised and keeping a lid on it will stop wanted volatile’s from escaping. The only component that actually benefits from heating is the VG. It will blend much easier with the PG and PG solution components of the mix. 60°C or 140°F is recommended.
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Thank you guys that helps
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And I tried your turbo steep method and it made a significant difference in flavor thank you so much. I have been so frustrated and was ready to give up. I have not been able to make any juice that has any flavor and it has been driving me crazy because I’m following the recipe and letting it steep for at least a week and yet no flavor. It is so perplexing and I just cant seem to get it right.
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That will put hair on your chest! 
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I have not, but have found a lemon mix that I make is great after a week but if I make 60 ml or so it gets dark colored and harsh and “sticky.”
I need to make some today so I am going to do 30 ml both with and without nic and let them sit for about a month - for science.
BTW I don’t use any heat or stirrer or anything like that. I put them in a dark cool drawer and shake every day without opening them.
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and then you got the ejuice oxidized… thats not “steeping”
Steeping is an “fusion” of all ingredient molecules together uniform through the whole mix. The ingreients have different sizes and weights on their molecules… thats what take time, to get them “fusioned” uniform through all part of the mix.
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You are absolutely correct. Processes that involve oxidation do not accomplish homogenization, which is the process you describe. That is done through time or by specific mechanical processes (i.e. high shear mixing).
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