How to Repair Bifold Door Top Roller Guide If your bifold door is sticking then it's likely that they need some maintenance. You may have to clean and lubricate them or adjust them. The problem may be caused by loose screws on the top pivot or the top roller guide. https://bifolddoorreplacement48578.like-blogs.com/30571529/bi-fold-door-repairs-10-things-i-d-love-to-have-known-earlier