CE4 Karnoo Clearomizer Won't Thread on 510 Ego Battery

[Hope729]

I hope someone can help with this problem. I've been buying my vape supplies from fasttech for several years but my last 2-3 orders of CE4 Karnoo clearomizers for my Ego II batteries won't thread onto the batteries tightly enough to stay attached.

Any ideas what I can do to correct this? Swap clearomizers maybe to a CE5 or something? TIA.