Done all every which way possible. All you need to do is remove mouthpiece or drip tip, drop in 8-10 drops into the side at an angle while rotating, repeat for next cart, drop in 6-8 drops, repeat on other cart, drop 4-6, repeat, drop 1 or two. Replace cap, immediately vape. On dry blanks, you can get more in, but have to wait a couple minutes for the polyfill to get wet after the first cycle, but then continue as before. Everything else is over complicated and a waste of time IMHO. I've actually wasted more
juice with syringes forcing juice out the bottom, and yes I have practiced and tried different syringes, etc... I just like simple and easy, no spin, no spill, no waste - one simple rule, stop when it is saturated. No offense to snow and many others, but no vid required; My 2c only