I get my LR510 atties from Heaven Gifts, and they all work fine, I take out the bridge and wick...
On a clean atty, I put 2 drops,
vape 3 or 4 times, then 1 drop,
vape awhile... 1 drop, vape awhile... maybe after about 10 drops, I blow the atty out from the top end, then wipe the threads on the bottom, and blow from that end to make sure the holes are clear. I do this routine all day, just as an example.
If your atty is leaking, maybe you need to blow it out more often, or maybe your drops aren't in the center, and they're landing on the mesh on the sides of the coil? Just some ideas.
I have a habit - when I vape, I don't move the e-cig away from my mouth. When I exhale a few times, the tip and the atty usually have water on them. It happens when the vapor passes over the e-cig. I thought my atty or drip tip was leaking, but they weren't
Good luck, and happy
vaping!