How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they need some maintenance. They could require cleaning or lubricated, or even adjusted. The problem may be caused by a loose screw on the top pivot or by the top roller guide. https://repairing-bifold-doors54630.blog-a-story.com/10722611/why-nobody-cares-about-bi-fold-door-repairs