Using this dog collar is a breeze. Just place it around your puppy's neck and let the buckle find its own spot for a perfect fit. Make sure it's not too tight or too loose - you should be able to fit two fingers between the collar and your puppy's neck. When it comes to cleaning, you can hand - wash the collar in mild, soapy water. Rinse it thoroughly and let it air dry. Avoid using harsh chemicals or putting it in the washing machine as this may damage the braided nylon or the enamel buckle. Also, regularly check the collar for any signs of wear and tear, especially as your puppy grows. If you notice any issues, it might be time to get a new one.