All products are made of Medical grade material, 100% safety, harmless to the body, (It is normal that you smell slight odor when first open, because product was in sealed package for months. Please clean it and dry it naturally, the smell will disappear soon 1.Clean the product before and after each use,Do not use alcohol, gasonline or acetone cleaners. 2.Keep the unit in a dry and safe place away from children. 3.To prolong its lifespan, please don't immerse it into water deliberately 4.Do not put the product directly into boiling water to clean it. If you have any questions, please do not hesitate to contact us. We will try our best to solve your problem within 24 hours. If you are not satisfied  
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