Hey Sambuca
I blew through 2 pkgs. I'm using my Provari and I start off at 3.6 and work my way up. My sweet spot is around 4.1 on the 1.8 coils. Juice is 50/50. Why are these damn coils flooding! I'm trying to get inside your brain!

oh ya...I'm using the largest air hole. Not filing to top but no matter how full the tank is it keeps flooding. I think god is trying to tell me to build my own
oh, you don't wanna be getting inside my brain! might take you years to recover! and they might never let you in church, again!
i use wattage, so let me think here. perhaps, 3.6v is too low. i use 7 cloupors, the battery drains if i go below 4v, so that's where i start. i'm using mostly 1.6ohm, cuz WoV got those in first. my 1.8 are clean, but sitting out till i figure out which goes better with which juice.
i just tried 3.7v on my sigelei20w. no, no no. it kind of bites. maybe that's it, try starting @4v. keep in mind, others are running these coils @14 watts and higher. i try to get 4.1 or 4.2 volts on delicate juices, like MBV freckled lemonade, but go way up to 4.9 to 5.1 on bakery stuff. going up to 4.9v, .1watt at a time, from 4v, takes forever!
i have a bunch of 50/50 juice, from ITC. they are all up over 4.4v. shoot, my spoon licker og is up to 4.9v already. and it might still have room to go.
perhaps, when it comes to your "sweet spot", you need to readjust your thinking. these coils are made to take some heat. start @4v, but ease it up to 4.3, then 4.5. if the coil isn't hot enough to heat the juice, that might be your issue. you be needing to play with fire!
and i still want to know who can afford to keep horses in taxachusetts! i mean, crikey! i'm from nausea (nashua). up in cow hampshah. there, you can only afford if you're into real estate, or missiles.
oh, and if these things can be rebuilt, that's the ticket!