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How to Fix Common Bifold Doors Repair Problems Bifold doors provide an elegant and stylish method of connecting living spaces. As with all doors, they could have issues that affect their performance. Thoroughly cleaning your bifold doors is vital to keep them looking the best they can. This also helps prevent the build-up of dirt that could interfere with their smooth operation. Loose Hinges Bifold doors unlike traditional closet doors are hinged in the middle and fold in order to maximize space