I am fairly new to hookah pens, and this is my first refill. I filled the tank about half way up untill the wick was full of juice. Then when I hit it, I got nothing, no vape at all. I tried recharging it but it didn't help. Also, I make my own wicks out of boiled cotton balls, and as far as I can see there is no difference. I really want to find out what's wrong, thank you