Hello, all. I have about 7 mini tanks that are close to three months old. I really only vape at the most 3 flavors at a time, but they have all been rotated and cleaned out about 4 times (vodka soak). At first I noticed that on some, the caps weren't as snug fitting. Then, I'd actually lose a cap in my pocket. That was fun. I took a closer look at them and they all have a vertical hairline crack about half an inch long. Is this to be expected? Kinda disappointed because my other brand tanks that fit have had no such issues. I really wish Halo's minis had screw-on caps. I know they're cheap, but since all of them have this fracture, I'm wondering if it's something I did wrong or is it an inherent problem with the tanks?