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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking to the wall, they might require some maintenance. They could need to be cleaned or lubricated, or even adjusted. The problem could be caused by an unfastened bolt on the top pivot or by the top guide roller. This kit comes with all the hardware required to restore your bi-fold closet door system to optimal performance. Take the door off Installing an interior set of bifold doors could seem like an involved and challenging tas