Hey all! I am fairly new at vaping, 45 days and I really love it. My current setup is a Kanger T2 on a Joye ego-c twist. Running a 2.5 ohm head at 4.2 volts. I have noticed my juice darkening after a couple of hours. Not sure if I should refill about half way or vape it down as far as possible. Am I adding good juice to juice that is getting stale? Will vaping it down give a fresher more flavorfull Vape?