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