I never drip any juice on my coils. I just fill the tank and let it sit for a few minutes.
Try taking the tank apart and blowing through the mouthpiece. Take the coil out, wipe it down, blow through it, get the juice out of there. Rinse the base and dry off if you feel so inclined.
Maybe you flooded it with juice, or maybe you're using too big of an air hole for the wattage you're pushing. I use a Nautilus Mini with my Kbox 40, which starts at 8w and then goes up to 13w, then 20w, then up in 5w increments to 40. At 8w the Nautilus just seems underpowered. It works at 8w with the smallest air hole, but it just... doesn't do it. At 13w, I find it works good on the second air hole. This is where I usually keep it. Sometimes, in short burts, I'll run 20w with the largest air hole. It performs fine here, but I quickly find it to be a bit much and back it down to 13w on the second hole. I've tried 25w, but at this level it seems burnt, even with the largest air hole, so I find 20w to be the maximum.
With widely adjustable mods like these, the first thing I would try if experiencing gurgling issues would be to just turn up the power a little temporarily and see if it goes away, unless it's really bad, I'd take the tank apart and clear it out.