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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking and squeaking, they may require some maintenance. They might require cleaning, lubricated or adjusted. The problem could be caused by an unfastened bolt on the top pivot, or by the top guide roller. This kit contains everything you need to restore your bi-fold wardrobe door system to its best performance. Remove the Door Installing an internal set of bifold doors could seem like a complex and complicated project however