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How to Repair Bifold Door Top Roller Guide If your bifold door is sticking then it's likely that they need some maintenance. They could need to be cleaned, lubricated or adjusted. The problem could be caused by a loose bolt at the top pivot or by the top guide roller. This kit includes everything you need to restore your bi-fold wardrobe door system to its peak performance. Remove the Door Installing an interior set of bifold doors may seem like a complex and difficult project, but it's