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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking then it's likely that they require some maintenance. It is possible that you need to clean or lubricate them, or even adjust them. The issue could be caused by an unfastened bolt on the top pivot or by the top guide roller. This kit includes all the hardware required to return your bi-fold closet door system to optimal performance. Remove the Door It may seem complicated and challenging