I recently bought this controller online and my right trigger doesn't feel as smooth as the left or the triggers on my other controllers. It feels like it's catching or scraping against something. There's nothing technically wrong with the controller, but the trigger thing annoys me. I was wondering if anyone knew how to fix it? I guess I'd have to take the controller apart but it's brand new and I'm afraid I'll do something wrong. My experience with taking things apart with screws and putting them back together ended up with the thing not feeling normal. I could practice on my other controller, which isn't as good. Any suggestions about the problem other than taking it apart?