If you need to loosen a nut or bolt in an old hinge, you may have a tough time if it has rusted over. Don't get frustrated yet; while it may seem like that bolt is stuck there forever, try this trick to get it to budge. Pour cola, 3 percent hydrogen peroxide, or lemon juice over the rusted nut or bolt and wait half an hour for the liquid to eat away at the rust enough for the fastener to turn freely. After this one easy step, something that seemed stuck for eternity will slide out effortlessly. If it's a screw you're having trouble with, check out our next tip.