I will have my tank partially filled (so i dont think its absorbing into the wicks) But I set it down for about 30 minutes before bed and refill it right before I go to sleep, itll be almost full when I go to sleep and then when i wake up it will drop a drastic amount. Ive noticed it in a few of my tanks and the current tank in question is the Kanger Protank 3, and I have it on my CoolFire 1. Any answers as to how this happens? Ive inspected for leaks and have found nothing. So far my only conclusions is that im sleep vaping, aliens are stealing my vape while I sleep, or my cats have learned to enjoy the sweet taste of my collection of space jam e liquids. Or it might have something to do with the coldness of my room. its about 65 degrees at night. Any real answers out there? 