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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck, they probably require a little attention. You may need to clean, lubricate or adjust them. The issue could be caused by an unfastened screw on the top pivot or the top guide roller. This kit includes all the hardware you need to restore your bi-fold wardrobe door system to its optimal performance. Take the door off It might seem difficult and difficult to install a set of bifold internal doors but for DIYer