If your atomizer is crackling/hissing - that is ok (juice vaporizing)
if an atomizer gurgles I would blow it out - take it off the ecig and blow it out into a tissue and also make sure its threads and the threaded end of the battery are dry. And if you bought auto batteries be aware you can damage or kill those batteries with juice leaks. You have a 510. 510 manuals are fully sealed metal on the threaded end (no hole) so they are safe from being damaged by juice leaks.
Are you using cartridge + atomizer? Are you using prefilled carts or filling them your self? If filling yourself, what PG/VG of juice and describe how you fill. And you did not pick a piece of white fiber off the metal mesh bridge of the atomizer did you? (because that is the wick and it's needed to use cartridges)
Also - when I used atomizer + cart, I would never ever lay the ecig flat nor set it with the cart up higher than the battery - that is just asking for juice to dump out of the cart. I would always set the ecig down with the cart a bit lower than the battery and hope the juice would stay in the cart. Then when I vaped I always held the cart end higher than the battery and hoped any leaks would be vaporized. But still - carts suck IMO. Now matter how careful you are with filling, no matter what kind of stuffing you use, sometimes they are going to dump their juice out into your atomizer or your mouth. If you continue to use carts, I recommend the precut blue foam stuffing for 510 carts from strictlyejuice.com (under $1 for 10 piece) and the tapered end goes into the cart. I would fill cart 1/2 way with juice, insert foam, press foam down into the liquid, repositioned foam at top edge of juice cup, top off until it looks just damp. While vaping, just top off as needed until topping off doesn't help - then do another full fill.
And I highly recommend you try Boge 510 3 ohm cartomizers or try Magma cartomizers. I use PG juices w/ 20% or less VG in the Boges and get over a week's use out of each. Only put juices you like in cartomizers. Most people prefer to vape with cartomizers and Boge are most popular but you could use any 510 threaded cartomizer 2.5 to 3 ohms. Anything lower is not for slim batteries.