My Batman 66 recently has the issue where the multiball diverter won’t stay open. The coil fires and immediately the diverter closes again. When you shoot up the loop the coil fires again and opens but closes. It’s as if it isn’t staying open like it once was. I’m wondering if it’s a bad coil or there’s slack in the joint but I’m not sure how to tighten it. Any help would be appreciated.