Don't you get leakage out the batt end? If they are so full they gurgle?I fill mine to the maximum and usually have a little gurgling for several hits, which is fine. I have noticed lately that 2 Taryn spins is all I ever need. 30 rotations in the air each spin. Then the filler is moist to the top or close enough that you can't add more than a few more drops. So I always quit after 2 Taryn spins now.