Professional Jewelry Cleaning Machine, Cleans dirty jewelry in minutes using only tap water, does not remove tarnish ( Add some Liquid Dish Soap to have a better clean result ) This ultrasonic cleaner comes with high-end waterproof surface finishing, ensuring durability while having a great tactile feeling. SUS 304 stainless steel tank provides good corrosion resistance, use any ultrasonic detergent/solution with peace. Ultrasonic cleaning is a physical process. If glasses have grease or coins are oxidized, can use alkaline cleaners such as hand sanitizer, soap, dishwashing liquid, etc. to make their physical ultrasonic cavitation combined with chemistry reach a depth cleaning effect.