By following these simple guidelines you can keep your Nano Jewelry pendant looking beautiful: Clean your pendant in lukewarm water and wipe down with a soft material cloth. Do not use any silver or gold cleaning products or a rough cloth. Sprays and detergents should be avoided. Sprays such as perfume or hairspray should be put on before wearing your jewelry and avoid contact with household detergents etc. Nano Jewelry uses only the highest quality materials so you can shower, swim in the sea or go to gym while wearing your pendant.