So I take it then I should NOT be dripping juice directly into the atomizer? I tried dripping a few drops onto the atomozier coil in the middle, and then a couple drops around the bottom resoirvoir around the coil. Is that wrong? Sorry, I'm a rookie with this!
You can drip safely with a 510 manual. The gurgling is coming from the fluid leaking down to near the air holes. Air passing through the fluid. The gurlging will go away on its own providing you don't excessively drip. I have found that the only problem with over dripping is that I can suck some of it up and into my mouth. I don't drip with my 510s though. I have found that I don't need to.
If you do drip, stick with just two to three drops, If I drip, I drip on the bridge/coil itslef, any excess will run down into the cup anyway. as along as the atty is clean and not gunked up it will wick it back up.
As for the question about atty life. I have not had a 510 atty die on me. I do find that they get gunked after several days of heavy vaping. I rotate them out and soak them in isopropyl alcohol/white vinegar bath for about 24 hours. then give them a good rinsing with hot water. If they are still not as clean as I would like, I drop them in a pot of boiling water for about 3 minutes. Then after they are thoroughly rinsed, If I am in a hurry for it, I will dry it out with a hair dryer. Otherwise I set it battery side down on a paper towel and let it dry that way until I need it again.