Repairing Bifold Doors The hardware that is used to hold the bifold doors together will deteriorate over time. Cleaning and lubricating all the mechanisms (including the lock) will keep them running smoothly and efficiently. Most of the time, the issue is a small issue that is easily fixed. This guide https://bi-folding-door-repair-ne93601.onzeblog.com/30508044/bi-fold-repairs-101-it-s-the-complete-guide-for-beginners