About 10 minutes ago, I tried to unscrew the top of my Nautilus X to fill it up with more juice but it's not unscrewing. It's stuck on there tightly. Any help or suggestions on how to unscrew it? Thanks.
Yep - rubber gloves usually do the trick. If that doesn't work, you might have to use a wrench or mole grips but use a cloth/rubber bands to protect the surface. Sometimes putting a tank in the freezer for a couple of hours will help too.
Tank tools if you have them, rubber gloves are a good backup and I sometimes find a good old fashioned tea towel does the trick. I have similar problems with the wismec amor mini tank it's a real PITA.