How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking, they probably need a little maintenance. You may need to clean and lubricate them or adjust them. The issue could be caused by a loose bolt on the top pivot or by the top guide roller. https://bifold-door-replacement58458.affiliatblogger.com/82645110/10-things-you-ve-learned-in-preschool-that-can-help-you-in-bi-fold-door-repairs