How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking, they probably require a little attention. They could need to be cleaned, lubricated or adjusted. The problem may be caused by a loose screw on the top pivot or by the top roller guide. This kit https://replace-bifold-doors02942.amoblog.com/bi-fold-door-repairs-the-good-the-bad-and-the-ugly-52604674