How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they require some maintenance. You may have to clean, lubricate or adjust them. The problem may be caused by loose screws on the top pivot or the top guide roller. This kit https://replacebifolddoors88874.blogzag.com/74683794/10-apps-that-can-help-you-control-your-bi-fold-door-repairs