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How to Repair Bifold Door Top Roller Guide If your bifold doors are sticking it's likely they need some maintenance. It is possible that you need to clean or lubricate them, or even adjust them. The issue could be caused by a loose bolt at the top pivot or by the top guide roller. This kit includes all the hardware you need to restore your bi-fold wardrobe door to its optimal performance. Remove the Door It may appear complicated and challenging to put in an internal set of bifold doors, but for DIYers with a little expe