I'd swear I've seen this topic here before, but a search didn't turn up what I needed. The top cap on my Stillare rda (original version, clone) is stuck and won't come off. I've tried the rubber band trick, the rubber kitchen gripper (with and without pliers), prying it off with the tip of a screwdriver, even putting it in the freezer for an hour but nothing seems to help. Any suggestions from anyone? It's one of my favorite RDAs and I'd hate to just trash it, plus the original (three post) seems to be out of production and no one I found has any left in stock so there's no way to replace it. Help, anyone?