new attny?
blow primer liquid out from battery end into paper towel.
Flood atty (hold sideways, drip verrrry slowly on the rounded bridge until liquid runs off the side) with your eliquid of choice (if you have plain PG or VG that works, too). Turn bridge-side up and let things soak in a second.
Blow out.
Flood again.
Blow out.
Clean/dry threads with papertowel or lint-free cloth squished up so you can twist it around inside the threads.
Attach battery and cart, vape.
The first few days, you're going to want to fiddle and check the cart frequently to make sure you're not getting anywhere near dry but you don't want the cart so full that it floods your atty and then leaks into your battery and kills it. After you get the hang of it, you'll immediatelly be able to tell from the subtle change in taste or draw when it's time to top off or use a new cart. (definitely for the first few days clean the battery threads frequently so you can see how much condensation gets on there - your goal is little to none)
When I first started, I was finicky, rinsing the attnys, blah blah blah. Then I stopped doing anything to them. I'm still on the same 2 everyday attys 160 days later, and have 3 others that have flavored carts on them that I use a few times a week each. Lost 3 batts in 6 months, lost zero attys. I use genuine SMOORE parts or Intellicig EVO parts YMMV
Hope this helps!
TTRP