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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck to the wall, they might require some maintenance. They may require cleaning, lubricated or adjusted. The issue could be caused by a loose bolt on the top pivot or by the top guide roller. This kit contains everything you need to restore your bi-fold wardrobe door to its best performance. Take the door off Installing a set of internal bifold doors may appear to be a complicated and challenging proje