I used toothpaste & a tooth brush.
Ultrasonic is actually the best way to clean diamond earrings!!!
How to Clean Diamond Earrings?
Most of the jewelry cleaners that you can buy are just ammonia and water. Use that and a soft tooth brush. Then rinse well.
Diamond cleaning is very simple and can be done without any hassle. Below are the few easy methods to clean.
Baking Soda: Put some baking soda in a cup of water, Take a fine cloth soak it in water and clean the jewellery.
Jewelry Cleaning Solution: This solution is easily available in stores. Put few drop in water and then clean using a cloth soaked in the solution.
Vodka: Take vodka as much as it is in vodka shot, Put your jewelery into it and keep it for sometime. After sometimes take it out and clean it with plain water.
Soap and Water: If your jewelery has dirt then the best way is to clean it with soap and water. Please be careful not to use any harsh chemical.
Diamond hoop earrings are beautiful and precious, and it's essential to take proper care of them. Just check several examples on https://www.fjewellery.co.uk/en/earrings-diamond-hoop/ and you will understand me! Cleaning diamond earrings might seem like a daunting task, but it doesn't have to be. The process is straightforward and can be done at home. Try to search some guides in internet.