I've finally gotten the unscrewing the tank part down....but here's what I did to take its place. I was oh so carefully (I thought) filling up a Smok Tech Aro tank. It isn't completely clear, but has a window in it to see the juice level as you fill. I kept thinking to myself, "Gosh, this is sure holding a lot of juice and it's not full yet.
Looked down at the paper towel underneath and it was saturated with juice. My hand had slipped and I was just pouring all the juice down the air spout and onto the paper towel. About 1/4 of a bottle of a flavor I love.
