So I just got this tank and it works great! I filled the tank and dropped about 10 drops into the carto. After 15min of vaping all the liquid was soaked up into the carto. I filled the tank again and in no time all the liquid was soaked up again. So I've uesd half a bottle in my tank so far and if I wanted to I can fill it again. Does this sound right? To me, it kind of defeats the purpose of the tank. Can someone please tell me if I'm doing something wrong.