Hey Bud!
We always mix at 20%, I've recently mixed some and left for a few weeks before vaping it and it tastes just fine! I'm really not sure what could be causing the bland taste. Bumping it upto 25% should be fine though.
It would also be a really good idea to add the list of 'Shake and Vape' but the downside to this is that all the clickable links are at the bottom of the page, and nobody really pays attention to them! But it's something on my to-do list right now so I can add it to the top of the page without making it look horrid.
Also,
@daesimps, I've been trying to sort these listings out so they're all on one list, unfortunately I'm unable to fit everything on one page as I planned on doing. The only thing I've been able to do as of now, in the recommended tab when you scroll down a bit, the corresponding listing (New/Old) of each Size you're currently looking at will always be there as of now. Sorry, but the website limits our listings.