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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking, it's likely that they require some maintenance. They may need to be cleaned, lubricated or adjusted. The issue could be caused by loose bolts at the top pivot or by the top guide roller. This kit contains all the hardware you require to restore your bi-fold wardrobe door system to its best performance. Take the door off Installing an interior set of bifold doors c