I am using e juice from Heaven Gifts, which I like straight. I'm using Humco glycerin, which is VG, I called the co. and asked all about it, and Lorann's flavoring. The nic juice is strawberry and I'm using strawberry Lorann's oil. I'm using this calculator to figure the amounts, I went from 24 mg to 18 mg and also halved it to 12. The juice seems thin and the first few vapes, I'm using a cartridge, are great, really thick and heavy, but quickly taper off to just almost nothing like I need to refill. I top off by dripping a few drops, then squishing the filler and pulling it back up to get the air out and keep adding drops till it's completely full. When I check my filler, it still looks wet and only takes a couple of drops to fill, so I should still have good vapor. I'm confused as to why my cut down juice isn't working so good?