I am a GIA diplomat and a professional jeweler. I'm a doctor too. I have been in the jewelry business for several decades and have used many cleaning products, solutions, machines, rags and chemicals. They all have credit for what I wanted from them. Simply this Magnasonic is the best ultrasonic cleaner in this price range! You can always buy more expensive, but why? Want a great US cleaner? It does the job! I tested it with cleaning. Tried my glasses, some desperately dirty diamond/gold items, old silver (after it had tarnished) and even some old coins. Excellent work! A few caveats: Never use with pearls; Never use jewelry with softer stones like opals and corals; Never use with cracked or loose items! Before placing colored stone jewelry in an ultrasonic cleaner, do some research on the internet, especially the GIA. If you are familiar with ultrasonic cleaners, here are my tips: 1) Soak diamond/gold rings in Windexยฎ for 10 minutes before placing them in the cleaner. 2) Use about 400ml of hot, such as coffee, DISTILLED or DEIONIZED water in the cleaner. Heat it up in a Pyrex measuring cup. 3) Use commercial American cleaners as directed, I love Ionix, OR Dawn(R) Dishwashing Liquid 4-5 drops. 4) Rinse jewelry or glasses with distilled or deionized water after cleaning. Follow the manufacturer's instructions and maybe my recommendations and you will be satisfied with the result. I do.
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