Our cleaning kit includes a cleaning cloth to gently wipe away any fingerprints and a brush custom made to perfectly fit the inside chamber. Use this brush to clean the inside of the mouthpiece with warm soapy water. We recommend using our cleaning brush to ensure the inside chamber is thoroughly cleaned and doesn’t get clogged up with unwanted dirt or residue. Please note: Our Mindful Breathing Necklaces are made from high quality stainless steel and have a long life, therefore, they will not discolour, fade or tarnish. You can also wear them in shower, however, we do not recommend them being in water for too long. You can extend the life of your necklace simply by taking good care of it. Please ensure you take off your necklace before using any hairsprays, perfumes, or any other products. Although water-resistant, it's best to avoid sea water and pool water, as salty water and chlorine could cause your necklace to lose its shine.