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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 could get worse. Cleaning and lubricating the mechanisms (including the lock) can keep them functioning smoothly and efficiently. Often, the problem is a small issue that is easily fixed. This guide will help you understand how to repair your bifold doors when they become difficult to open or close. Cracked Pivot Pins A bifold door is a set of panels that