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Repairing Bifold Doors Bifold doors can be an excellent addition to your home but with time, the hardware that holds them together will get worse. Cleaning and lubricating the mechanism (including the lock) will keep them running smoothly and efficiently. Often, the problem is something small that is easily fixed. This guide will show you how to fix your bifold doors when they become difficult to open or close. Cracked Pivot Pins A bifold door is made up of two panels that slide along