Using this dog collar is easy. First, measure your dog's neck accurately and follow the fitting instructions to choose the right size. When putting it on your dog, make sure it's not too tight or too loose. You should be able to fit two fingers comfortably between the collar and your dog's neck. As for maintenance, keep it away from water and extreme heat. If it gets dirty, you can use a soft, damp cloth to gently wipe it clean. Check the buckle and dee regularly to ensure they are in good working condition. This way, your dog's collar will last a long time.