I know the math but there was already vape juice in there I did not put both e juices in a just added the 0mg. I am fine with it being a little over 8mg I just can’t smoke the pure 24mg. The first couple hits were just as strong as when it was just 24mg juice in there. I’m just wondering if it’s because it takes a little while of smoking for the pure 24mg vape juice to completely leave the coils and the mixed vape juice to enter.
Well, the easiest way is to simply empty the tank and refill with what works for you.
As far as the coil and how much is in it, that's just a question of time that the liquid that's in it will be used and replaced...
Note that if this is a cartridge coil, you might be better to simply replace it, as it might also be used enough that it might be old and harsh to use at this point.
You can try and blow into it, (the vapour will exit via the airfeed) but make sure that you don't get a mess doing it, that would clear out the stronger liquid that's in the coil without you choking yourself.