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Bi Fold Door Repair - How to Fix Leaning Doors Without Removing the Hinges Bi-fold doors are elegant and practical way to connect your indoor and outdoor areas. Like all doors, they should be maintained properly to work effectively. You can do this by cleaning and lubricating the mechanisms, including your lock, so that they run smoothly. This will help prevent issues that can cause them to fall or become misaligned. Fix a Leaning Door It is possible for your door to lean, creating gaps between the fram