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Repairing Bifold Doors Bifold doors are a great feature for your home, but as time passes, the hardware that holds them together can get worse. Cleaning and lubricating all the mechanisms (including the lock) will keep them working efficiently and smoothly. Most of the time, the issue is something small that can be fixed easily. This guide will explain how to fix your bifold door when it becomes difficult to open or shut. Cracked Pivot