How to Repair Bifold Door Top Roller Guide If your bifold door is sticking it's likely they need some maintenance. You may need to clean or lubricate them, or even adjust them. The problem could be caused by an unfastened bolt on the top pivot, or by the top guide https://bifold-door-roller-replac62526.thezenweb.com/why-nobody-cares-about-bi-fold-door-repairs-68356524