I have the rival scvc600 slow cooker. I do not have the original manual. Downloaded a generic one from their website but it does not show how to remove the hinged lid. The hinge will not just "lift off" like the one described. It appears to be permanently attached. I do not see where I can "unscrew" any thing to help with removal. This was display from Target that did not have the paperwork with it. Any suggestions?