Just was thinking tonight....... Is there any issues with leaving a tank sit for a day, or more ? Just wondering if i should dump out tanks were not using daily. Started with just 2 CE-4's Now have 5 of them and 2 Evod's. I switch out 2 tanks during the day depending on what i want to vape. But my wife tends to just stick to one tank and mixes flavors to see if any combos seem good. Thoughts on it ?