Well, if it's overfilled, it will spit and gurgle. Try filling it 2/3 and let it sit for a while. Then, take a few drags off your vape (without pushing the button) and slowwwllly up your wattage until you hit your sweet spot (may change, even on the same coil) you shouldn't have gurgling and spitting if you don't overfill. If you do, blow hard out the airholes for 10--20 seconds, and any "rogue" juice floating around where it shouldn't be causing problems should be vaporized and you should be okay after that. To be fair, I have the aspire cleto, not the one that was just released? The Cleto 120? I'm not sure which tank you have, it may be the coils, but I couldn't tell you from here.
Good luck!
Anna