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Repairing Bifold Doors The hardware that is used to hold the bifold doors together can deteriorate over time. Cleaning and lubricating the mechanism (including the lock) can help keep them working smoothly and efficiently. Often, the problem is minor and can be 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 slide along tracks that are tha