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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck to the wall, they might need a little maintenance. They could require cleaning, lubricated or adjusted. The problem may be caused by a loose screw on the top pivot or by the top guide roller. This kit includes everything you need to restore your bi-fold wardrobe door to its peak performance. Take the door off Installing an interior set of bifold doors could seem like an involved and difficult task