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Worn-out, broken, or damaged rollers are the most likely culprit for sliding doors that can’t seem to stay on the tracks. Replacing the rollers is a straightforward repair that will help keep your door in the track and make opening and closing it easy. Once you’ve replaced the rollers, be sure to clean and inspect them regularly to keep them in good condition.

You may be able to repair a door closer, but often, it’s easier (and more cost-effective) to simply replace it. You may want to try fixing a door closer if the rod gets bent out of shape. If that happens, you can simply straighten it back into position. Using a flat, durable surface, line up the bent rod so the bend is pointing up. Then strike the bent rod with a rubber mallet, slowly pounding it back into place. If you can’t fix the closer, buying a new one is still a quick and inexpensive fix.

While it may seem counterintuitive, adding moisture to the warped area of a door actually helps to fix it by allowing the wood to expand and contract. Moisture helps loosen the fibers in your door to make them more malleable. This process can help you get the wood back to its original shape.

Even if you’re an advanced DIYer, repairing a sliding glass door yourself is not a good idea. This project requires precise measurements and work to ensure the door aligns properly within the space and frame, otherwise, you’ll have an uneven door on your hands. Additionally, most repairs require knowledge of taking the door apart and putting it back together with the replacement part, which if not done correctly, could cause massive problems. It’s best to leave this project to a sliding door repair specialist.