I just received this today. The instructions say to fill the tank, you unscrew the top cap. I can't get mine unscrewed. I have tried pliers, but it's hard to get a grip on it due to the bevel and I don't want to break the glass. Any tricks to getting the top cap unscrewed??
Hey Jingles,
I actually had a similar problem with my own iSub-B. The first run had a number of tanks tightened too much from the factory, and fortunately has been rectified. However, many will encounter the situation you're in from the first batch. Here are my personal tips that worked for me to get that top cap to budge!
1. Let the tank sit in the freezer for about 30 minutes. This allows the o-rings to shrink slightly. Heat can do the same, but can damage your o-rings permanently if you aren't careful.
2. Use rubber latex gloves while turning the top of the tank to improve your grip.
3. Wrap the Innokin vape band or a rubber band around the top section of the tank for more grip, or for protection if you are using pliers or a similar tool.
4. Run the tank under hot water for a minute or two. It can have a similar affect to step 1 if the freezer drink didn't help much.
You will likely need to use a combination of these to get it to move, but I promise it'll get there. I spent a good hour and a half getting my first one open, and then the later revised batch unscrewed immediately without issue. I do apologize for the trouble! Out of curiosity, what color iSub-B is giving you trouble?