How to Repair Bifold Door Top Roller Guide If your bifold door is sticking, it's likely that they require some maintenance. You may need to clean and lubricate them or adjust them. The problem may be caused by a loose screw on the top pivot or the top roller guide. https://bifolddoorrollerreplaceme93732.win-blog.com/10884052/14-smart-ways-to-spend-your-on-leftover-bi-fold-door-repairs-budget