There are several menthol flavors. If FLV Cool Menthol is not to your liking, try another menthol flavor.
I would let it steep for a few days and then try it.
vaping flavors straight from the bottle is not recommended. You will not taste the true flavor as all flavors do best with steeping.
With DIY flavors you really can't go by
reviews on BCF or elsewhere.
Why?
Because what one person says is the best flavor, another person will say it tastes like crap.
For me personally, flavor
reviews are completely useless. My flavor notes would be of no use to anyone. Everyone's sense of taste is very different.