Using these Chef grill door hinge assemblies is easy. First, make sure your stove is turned off and cooled down. Remove the old hinges carefully. Then, install the new hinges by aligning them with the holes on the grill door and the stove. Make sure they are firmly attached. When it comes to maintenance, keep the hinges clean. You can use a soft cloth to wipe off any dirt or debris. Check the pivot points regularly for signs of wear. If you notice any excessive wear or if the door doesn't close properly, let us know right away. Remember, the 3 - month warranty starts from the date of purchase. The warranty doesn't cover damage from improper use or normal wear - and - tear that doesn't affect the function. Also, return postage is on you if you need to use the warranty. So, use the hinges with care and enjoy your cooking!