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2. Hard To Open Locks

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There's nothing quite like the moment of fear when you're trying to open the front door and it won't open. A sticky lock where the key doesn't turn properly is not something you should be dealing with. All you need to do to fix this classic household problem is some powdered graphite which you can easily find online. It comes in a little tube that you can squeeze into the keyhole, and you will free yourself from the heart-stopping moment where you ask yourself, "Am I locked out!?"